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Check the below NCERT MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Life Processes Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-6/

You can refer to NCERT Solutions for Class 10 Science Chapter 6 Life Processes to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Life Processes Class 10 MCQs Questions with Answers

Life Processes Class 10 MCQ Question 1.
The enzyme responsible for the digestion of proteins in the small intestine is:
(a) Pepsin
(b) Trypsin
(c) Amylase
(d) Lipase

Answer

Answer: (b) Trypsin

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Class 10 Life Processes MCQ Question 2.
The part where the exchange of gases occurs during respiration is:
(a) Lungs and larynx
(b) Alveoli and throat
(c) Throat and lungs
(d) Alveoli and capillaries

Answer

Answer: (d) Alveoli and capillaries

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Life Processes MCQ Class 10 Question 3.
The back flow of blood during the pumping of blood by heart is prevented by:
(a) Walls of ventncles
(b) Walls of atrium
(c) Valves in heart
(d) Walls between atria and ventricles

Answer

Answer: (c) Valves in heart

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MCQ On Life Processes Class 10 Question 4.
The process of digestion is completed by:
(a) Intestinal juice
(b) trypsin
(c) bile juice
(d) pepsin

Answer

Answer: (a) Intestinal juice

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Class 10 Science Chapter 6 MCQ Question 5.
The extracellular fluid released from the capillaries is:
(a) serum
(b) plasma
(c) lymph
(d) mucus

Answer

Answer: (c) lymph

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MCQ Of Life Processes Class 10 Question 6.
A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
(a) complex proteins
(b) simple proteins
(c) fats
(d) starch

Answer

Answer: (d) starch

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Class 10 Life Process MCQ Question 7.
In which part of the alimentary canal food is finally digested?
(a) Stomach
(b) Mouth cavity
(c) Large intestine
(d) Small intestine

Answer

Answer: (d) Small intestine

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MCQ Life Processes Class 10 Question 8.
When air is blown from mouth into a test-tube containing lime water, the lime water turned milky due to the presence of
(a) oxygen
(b) carbon dioxide
(c) nitrogen
(d) water vapour

Answer

Answer: (b) carbon dioxide

---

Ch 6 Science Class 10 MCQ Question 9.
What prevents backflow of blood inside the heart during contraction?
(a) Valves in heart
(b) Thick muscular walls of ventricles
(c) Thin walls of atria
(d) All of the above

Answer

Answer: (a) Valves in heart

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Class 10 Science Ch 6 MCQ Question 10.
In which of the following vertebrate group/groups, heart does not pump oxygenated blood to different parts of the body?
(a) Pisces and amphibians
(b) Amphibians and reptiles
(c) Amphibians only
(d) Pisces only

Answer

Answer: (d) Pisces only

---

Life Processes Class 10 MCQ With Answers Question 11.
Which of the following equations is the summary of photosynthesis?
(a) 6CO₂ + 12H₂O → C₆H₁₂O₆ + 6O₂ + 6H₂O
(b) 6CO₂ + H₂O + Sunlight → C₆H₁₂O₆ + O₂ + 6H₂O
(c) 6CO₂ + 12H₂O + Chlorophyll + Sunlight → C₆H₁₂O₆ + 6O₂ + 6H₂O
(d) 6CO₂ + 12H₂O + Chlorophyll + Sunlight → C₆H₁₂O₆ + 6CO₂ + 6H₂O

Answer

Answer: (c) 6CO₂ + 12H₂O + Chlorophyll + Sunlight → C₆H₁₂O₆ + 6O₂ + 6H₂O

---

Life Process Class 10 MCQ Question 12.
Which is the first enzyme to mix with food i the digestive tract?
(a) Pepsin
(b) Cellulose
(c) Amylase
(d) Trypsin

Answer

Answer: (c) Amylase

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MCQs Of Life Processes Class 10 Question 13.
Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
(a) conversion of pyruvate to ethanol
(b) conversion of pyruvate to glucose
(c) non conversion of glucose to pyruvate
(d) conversion of pyruvate to lactic acid

Answer

Answer: (d) conversion of pyruvate to lactic acid

---

MCQs On Life Processes Class 10 Question 14.
Choose the correct path of urine in our body
(a) kidney → ureter → urethra → urinary bladder
(b) kidney → urinary bladder → urethra → ureter
(c) kidney → ureters → urinary bladder → urethra
(d) urinary bladder → kidney → ureter → urethra

Answer

Answer: (c) kidney → ureters → urinary bladder → urethra

---

Fill in the blanks

1. More energy is made available to the organims by the …………… respiration.

Answer

Answer: Aerobic

---

2. Plants store most of their wastes in the membrane hound structures called …………… present in their cells.

Answer

Answer: Vacuoles

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3. Plants can get rid of excess water by ……………

Answer

Answer: transpiration

---

4. Artificial kidney is a device which carries out …………… to remove nitrogenous waste products from the blood.

Answer

Answer: Dialysis

---

5. The tubular parts of the nephron selectively …………… the substances needed by the body.

Answer

Answer: reabsorbs

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6. The purpose of making …………… is to filter out harmful nitrogenous waste products from the blood.

Answer

Answer: Urine

---

7. The osmotic pressure in phloem increases on transfer of …………… into it from the leaves.

Answer

Answer: Sucrose

---

8. The major driving force for the water in the xylem during day time is the ……………

Answer

Answer: transpiration pull

---

9. Water conducting channels are formed by the …………… and the …………… of the xylem tissue.

Answer

Answer: tracheids, vessels

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10. Some amount of plasma, proteins and blood cells escape from …………… the wall into intercellular spaces in the tissues to form the tissue fluid or lymph.

Answer

Answer: capillary

---

11. Fishes have a heart with …………… chambers while the amphibians have …………… chambers in their heart.

Answer

Answer: two, three

---

12. Capillaries join together to form …………… that convey the blood away from the organ or tissue.

Answer

Answer: veins

---

13. Veins have …………… to ensure that the blood flows through them only in one direction.

Answer

Answer: valves

---

14. To ensure a sufficient time for oxygen to be absorbed and for the carbon dioxide to be released lungs contain a …………… of air.

Answer

Answer: residual volume

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15. A respiratory pigment called …………… has a high affinity for oxygen and helps to transport oxygen to various parts of our body.

Answer

Answer: haemoglobin

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16. The build-up of …………… during …………… respiration is the cause of muscular cramps.

Answer

Answer: lactic acid, anaerobic

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17. The wall of small intestine has …………… which help in absorption of digested food.

Answer

Answer: villi

---

18. Pancreatic juice contains trypsin for digesting …………… and …………… for breaking down emulsified fats.

Answer

Answer: proteins, lipase

---

19. The saliva has …………… to help in the digestion of starch present in the food.

Answer

Answer: salivary amylase

---

Match the column I with column II and mark the correct option from the codes given below

Column I	Column II
(i) Salivary amylase	(a) Nephron
(ii) Lactic acid	(b) Protein
(iii) Cuticle	(c) Carbon dioxide
(iv) Trypsin	(d) Blood
(v) Heterotrophic	(e) Waxy coating
(vi) Potassium hydroxide	(f) Starch
(vii) Lipase	(g) Muscles
(viii) Filtration unit	(h) Cuscuta
(ix) Connective tissue	(j) Fatty acids and glycerol

Answer

Answer:

Column I	Column II
(i) Salivary amylase	(f) Starch
(ii) Lactic acid	(g) Muscles
(iii) Cuticle	(e) Waxy coating
(iv) Trypsin	(b) Protein
(v) Heterotrophic	(h) Cuscuta
(vi) Potassium hydroxide	(c) Carbon dioxide
(vii) Lipase	(i) Fatty acids and glycerol
(viii) Filtration unit	(a) Nephron
(ix) Connective tissue	(d) Blood

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We hope the given NCERT MCQ Questions for Class 10 Science Chapter 6 Life Processes with Answers Pdf free download will help you. If you have any queries regarding Life Processes CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 5 Periodic Classification of Elements with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Periodic Classification of Elements Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-5/

You can refer to NCERT Solutions for Class 10 Science Chapter 5 Periodic Classification of Elements to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Periodic Classification of Elements Class 10 MCQs Questions with Answers

Periodic Classification Of Elements Class 10 MCQ Question 1.
Which one of the following does not increase while moving down the group of the periodic table?
(a) Atomic radius
(b) Metallic character
(c) Valence
(d) Number of shells in an element.

Answer

Answer: (c) Valence

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Periodic Table Class 10 Icse MCQ Question 2.
On moving from left to right in a period in the periodic table, the size of the atom
(a) increases
(b) decreases
(c) does not change appreciably
(d) first decreases and then increases.

Answer

Answer: (b) decreases

---

MCQ On Periodic Classification Of Elements Question 3.
An atom of an element has the electronic configuration 2, 8, 2. To which group does it belong?
(a) 4th group
(b) 6th group
(c) 3rd group
(d) 2nd group

Answer

Answer: (d) 2nd group

---

Class 10 Science Chapter 5 MCQ Question 4.
In modern periodic table, elements are arranged according to their
(a) atomic weight
(b) density
(c) atomic number
(d) melting point

Answer

Answer: (c) atomic number

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MCQ On Periodic Classification Of Elements Class 10 Pdf With Answers Question 5.
In which group are inert elements placed? ‘
(a) Group 8
(b) Group 10
(c) Group 1
(d) Group 18

Answer

Answer: (d) Group 18

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Periodic Classification Of Elements MCQ Question 6.
Which of the following sets of atomic number belong to that of alkali metals?
(a) 1, 12, 30, 4, 62
(b) 37, 19, 3, 55
(c) 9, 17, 35, 53
(d) 12, 20, 56, 88

Answer

Answer: (b) 37, 19, 3, 55

---

MCQ Of Periodic Classification Of Elements Question 7.
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
(a) Metal
(b) Metalloid
(c) Non-metal
(d) Left-hand side element

Answer

Answer: (b) Metalloid

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Periodic Table MCQ Questions And Answers Question 8.
The amount of energy released when one or more electrons is added to the neutral atom is
(a) electron affinity
(b) ionisation energy
(c) electron negativity
(d) atomicity

Answer

Answer: (a) electron affinity

---

Chapter 5 Science Class 10 MCQ Question 9.
The valence shell of element A contains 3 electrons while the valence shell of element B contains 6 electrons. If A combines with B, the probable chemical formula of the compound is
(a) AB₂
(b) A₂B
(c) A₂B₃
(d) A₃B₂

Answer

Answer: (c) A₂B₃

---

Class 10 Science Ch 5 MCQ Question 10.
Arrange the following elements in the order of their increasing non-metallic character.
Li, O, C, Be, F
(a) F < O < C < Be < Li
(b) Li < Be < C < O < F
(c) F < O < C < Be < Li
(d) F < O < Be < C < Li

Answer

Answer: (b) Li < Be < C < O < F

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Chapter 5 Class 10 Science MCQ Question 11.
What type of oxide would E&a-aluminium form?
(a) EO₃
(b) E₃O₂
(c) E₂O₃
(d) EO

Answer

Answer: (c) E₂O₃

---

MCQs Of Periodic Classification Of Elements Question 12.
Which of these belong to the same period?

(a) A, B
(b) B, C
(c) C, A
(d) A, B & C

Answer

Answer: (b) B, C

---

Class 10 Chapter 5 Science MCQ Question 13.
Which of the following property will be common in group 1 elements?
(a) Mass number
(b) Number of protons in nucleus
(c) Atomic number
(d) Number of valence electrons

Answer

Answer: (d) Number of valence electrons

---

MCQ Periodic Classification Of Elements Question 14.
Which one of the following elements exhibit maximum number of valence electrons?
(a) Na
(b) Al
(c) Si
(d) P

Answer

Answer: (d) P

---

Periodic Table Class 10 MCQ Question 15.
Which of the following gives the correct increasing order of the atomic radii of O, F and N?
(a) O, F, N
(b) N, F, O
(c) O, N, F
(d) F, O, N

Answer

Answer: (d) F, O, N

---

Question 16.
Element ‘A’ has electronic configuration 2, 7; ‘B’ has electronic configuration 2, 8, 5 and ‘C’ has electronic configuration 2, 8, 7. Which two elements will exhibit similar chemical properties?
(a) A and C
(b) A and B
(c) B and C
(d) None of these

Answer

Answer: (a) A and C

---

Question 17.
Which of the following elements does not lose an electron easily?
(a) Na
(b) F
(c) Mg
(d) Al

Answer

Answer: (b) F

---

Question 18.
Which of the following are the characteristics of isotopes of an element?
(i) Isotopes of an element have same atomic masses
(ii) Isotopes of an element have same atomic number
(iii) Isotopes of an element show same physical properties
(iv) Isotopes of an element show same chemical properties
(a) (i), (iii) and (iv)
(b) (ii), (iii) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Answer

Answer: (b) (ii), (iii) and (iv)

---

Question 19.
An element-X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong?
(a) Group 1
(b) Group 4
(c) Group 2
(d) Group 3

Answer

Answer: (b) Group 4

---

Question 20.
Which of the following properties does not match element of the halogen family?
(a) They have seven electrons in their valence shell.
(b) They are highly reactive.
(c) They are metallic in nature.
(d) They are diatomic in their molecular form.

Answer

Answer: (c) They are metallic in nature.

---

Question 21.
Upto which element, the Law of Octaves was found to be applicable.
(a) Oxygen
(b) Calcium
(c) Cobalt
(d) Potassium

Answer

Answer: (b) Calcium

---

Question 22.
According to Medeleev’s Periodic Law, the elements were arranged in the periodic table in the order of
(a) increasing atomic number
(b) decreasing atomic number
(c) increasing atomic masses
(d) decreasing atomic masses

Answer

Answer: (c) increasing atomic masses

---

Question 23.
Consider the following elements:
₂₀Ca, ₈O, ₁₈Ar, ₁₆S, ₄Be, ₂He
Which of the above elements would you expect to be in group 16 of the periodic table?
(a) ₂₀Ca and ₁₆S
(b) ₂₀Ca and ₈O
(c) ₁₈Ar and ₁₆S
(d) ₈O and ₁₆S

Answer

Answer: (d) ₈O and ₁₆S

---

Question 24.
The electronic configuration of the atom of an element X is 2, 4, 8. In the modern periodic table, the element X is placed in:
(a) 2nd group
(b) 4th group
(c) 14th group
(d) 8th group

Answer

Answer: (c) 14th group

---

Question 25.
Which of the following element would lose an electron easily?
(a) Mg
(b) Na
(c) K
(d) Ca

Answer

Answer: (c) K

---

Question 26.
The element A, B, C, D and E have atomic numbers 9, 11, 17, 12 and 13 respectively. The pair of elements which belongs to the same group of the periodic table is:
(a) A and B
(b) B and D
(c) A and C
(d) D and E

Answer

Answer: (c) A and C

---

Question 27.
Which one of the following does not increase while moving down the group of the periodic table?
(a) Atomic radius
(b) Metallic character
(c) Valence electrons
(d) Shells in the atoms

Answer

Answer: (c) Valence electrons

---

Question 28.
The Newlands Law of Octaves for the classification of elements was found to be applicable only up to the element
(a) Potassium
(b) Calcium
(c) Cobalt
(d) Thorium

Answer

Answer: (b) Calcium

---

Question 29.
An element X forms an oxide X^g. In which group of Modem periodic table is this element placed?
(a) Group 2
(b) Group 3
(c) Group 5
(d) Group 13

Answer

Answer: (b) Group 3

---

Question 30.
The atomic numbers of the elements Na, Mg, K and Ca are 11, 12, 19 and 20 respectively. The element have the largest atomic radius is:
(a) Mg
(b) Na
(c) K
(d) Ca

Answer

Answer: (c) K

---

Question 31.
Where would you locate the element with electronic configuration 2, 8 in the Modern Periodic Table?
(a) Group 8
(b) Group 18
(c) Group 10
(d) Group 16

Answer

Answer: (b) Group 18

---

Question 32.
Which of the following is the valance shell for the elements of second period of the modern periodic table?
(a) M shell
(b) K shell
(c) L shell
(d) N shell

Answer

Answer: (c) L shell

---

Question 33.
Which of the following statements is not a correct statement about the trends when going from left to right across the periods of the periodic table?
(а) The elements becomes less metallic in nature
(b) The number of valance electrons increases
(c) The atoms lose their electrons more easily
(d) The oxides become more acidic

Answer

Answer: (c) The atoms lose their electrons more easily

---

Question 34.
The longest period of the Modern Periodic Table is period.
(a) first
(b) second
(c) fourth
(d) sixth

Answer

Answer: (d) sixth

---

Question 35.
The inert gas which lies in third period is
(a) Helium
(b) Neon
(c) Argon
(d) Xenon

Answer

Answer: (c) Argon

---

Question 36.
An element with atomic number 40 is placed in period.
(a) 5
(b) 6
(c) 4
(d) 3

Answer

Answer: (a) 5

---

Question 37.
The total number of electrons present in the first twenty elements of the periodic table is
(a) 250
(b) 230
(c) 210
(d) 190

Answer

Answer: (c) 210

---

Question 38.
The element with atomic number 26 will be found in group
(a) 2
(b) 8
(c) 6
(d) 10

Answer

Answer: (b) 8

---

Question 39.
Eka-aluminium and Eka-silicon are known as
(a) gallium and germanium
(b) aluminium and silicon
(c) iron and sulphur
(d) neutron and proton

Answer

Answer: (a) gallium and germanium

---

Question 40.
When an atom of iodine becomes an iodine ion (I^–) the radius will
(a) decrease
(b) increase
(c) remain the same
(d) none

Answer

Answer: (b) increase

---

Question 41.
Which type of elements are poor conductors of heat and electricity?
(a) Metals
(b) Non-metals
(c) Gases
(d) None of these

Answer

Answer: (b) Non-metals

---

Question 42.
What is the symbol of the element Tungsten?
(a) Tu
(b) W
(c) Ta
(d) Tw

Answer

Answer: (b) W

---

Question 43.
Which of the element whose atomic number is given below cannot accommodate in the present set up of the long form of the periodic table?
(a) 107
(b) 118
(c) 102
(d) 126

Answer

Answer: (d) 126

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Fill in the blanks

I am the Modern Periodic Table, where elements are arranged on the basis of ……………. I have horizontal rows called ……………. and ……………. vertical columns are called ……………. My first period is very short with ……………. elements and second and third periods contain ……………. elements, fourth and fifth ……………. has ……………. elements. Sixth period has ……………. elements but seventh period is ……………. with space for more elements. 17 group is of ……………., 18 is of ……………. Atomic size of the elements ……………. across the period but ……………. down the group. Metallic character ……………. across the period but non-metallic character ……………. Number of valence electrons ……………. across the period and the valency ……………. but valency of the elements is ……………. in a group. All the properties of elements are the Periodic function of their …………….

Answer

Answer:
atomic number
seven
periods
eighteen
groups
two
eight
eighteen
thirty two
incomplete
halogen
noble gases
decreases
increases
decreases
increases
increases
first increases and then decreases
same
atomic number.

---

Match the following columns

1.

Column I	Column II
(a) Highest electronegativity	(P) Caesium
(b) Highest electron affinity	(q) Ruthenium
(c) Highest electropositivity	(r) Fluorine
(d) Highest oxidation number	(s) Chlorine

Answer

Answer:

Column I	Column II
(a) Highest electronegativity	(r) Fluorine
(b) Highest electron affinity	(s) Chlorine
(c) Highest electropositivity	(P) Caesium
(d) Highest oxidation number	(q) Ruthenium

---

2.

Column I	Column II
(a) F	(p) Metallic oxide
(b) Na	(q) Noble gas
(c) Ne	(r) group 1, alkali metal
(d) Na2O	(s) Halogen, group-17

Answer

Answer:

Column I	Column II
(a) F	(s) Halogen, group-17
(b) Na	(r) group 1, alkali metal
(c) Ne	(q) Noble gas
(d) Na2O	(p) Metallic oxide

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3. The table given below shows a part of the periodic table.

Column I	Column II
(a) P	(P) P
(b) Q	(q) Mg
(c) R	(r) Ne
(d) T	(s) O
(e) U	(t) Ar

Answer

Answer:

Column I	Column II
(a) P	(q) Mg
(b) Q	(s) O
(c) R	(r) Ne
(d) T	(P) P
(e) U	(t) Ar

---

Complete the following crossword.

Across:
1. An element with atomic number 12.
3. Metal used in making cans and member of Group 14.
4. A lustrous non-metal which has 7 electrons in its outermost shell.
Down:
2. Highly reactive and soft metal which imparts yellow colour when subjected to flame and is kept under kerosene.
5. The first element of second Period.
6. An element which is used in making fluorescent bulbs and is the second member of Group 18 in the Modern Periodic Table.
7. An radioactive element which is the last member of halogen family.
8. Metal which is an important constituent of steel and forms rust when exposed to moist air.
9. The first metalloid in Modem Periodic Table whose fibres are used in making bullet-proof vests.

Answer

Answer:
Across:
1. Magnesium
3. Tin
4. Iodine

Down:
2. Sodium
5. Lithium
6. Neon
7. Astatine
8. Iron
9. Boron

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We hope the given NCERT MCQ Questions for Class 10 Science Chapter 5 Periodic Classification of Elements with Answers Pdf free download will help you. If you have any queries regarding Periodic Classification of Elements CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Carbon and Its Compounds Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-4/

You can refer to NCERT Solutions for Class 10 Science Chapter 4 Carbon and Its Compounds to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Carbon and Its Compounds Class 10 MCQs Questions with Answers

Question 1.
Carbon exists in the atmosphere in the form of
(a) carbon monoxide only
(b) carbon monoxide in traces and carbon dioxide
(c) carbon dioxide only
(d) coal

Answer

Answer: (b) carbon monoxide in traces and carbon dioxide

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Question 2.
Graphite is used as a lubricant in machines because
(a) it is a good conductor of electricity.
(b) it has a high melting point and slippery layers.
(c) its density ranges from 1.9 to 2.3 g/cm³.
(d) it is strong and soft.

Answer

Answer: (b) it has a high melting point and slippery layers.

---

Question 3.
The allotrope of carbon which is a good conductor of heat and electricity is
(a) diamond
(b) graphite
(c) charcoal
(d) none of these

Answer

Answer: (b) graphite

---

Question 4.
Which of the following does not belong to the same homologous series?
(a) CH₄
(b) C₂H₆
(c) C₃H₈
(d) C₄H₈

Answer

Answer: (d) C₄H₈

---

Question 5.
Which of the following is not considered as crystalline allotrope of carbon?
(a) Coal
(b) Diamond
(c) Graphite
(d) Fullerence

Answer

Answer: (a) Coal

---

Question 6.
Which form of carbon is found in Golkonda mines of Karnataka?
(a) Diamond
(b) Graphite
(c) Coal
(d) Coke

Answer

Answer: (a) Diamond

---

Question 7.
Lead pencil contains
(a) graphite
(b) diamond
(c) lead
(d) lead sulphate

Answer

Answer: (a) graphite

---

Question 8.
Mineral acids are stronger acids than carboxylic acids because
(i) mineral acids are completely ionised
(ii) carboxylic acids are completely ionised
(iii) mineral acids are partially ionised
(iv) carboxylic acids are partially ionised
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer

Answer: (a) (i) and (iv)

---

Question 9.
When ethyl alcohol and acetic acid are mixed, the resulting ester has a chemical formula
(a) CH₃COOC₂H₅
(b) C₂H₅COOCH₃
(c) C₂H₅COOC₂H₅
(d)CH₃COOCH₃

Answer

Answer: (a) CH₃COOC₂H₅

---

Question 10.
A few drops of ethanoic acid were added to solid sodium carbonate. The observation made was that
(a) a hissing sound was produced
(b) brown fumes evolved
(c) brisk effervescence occurred
(d) a pungent smelling gas evolved

Answer

Answer: (c) brisk effervescence occurred

---

Question 11.
A reagent which can help us to distinguish between alkenes and alkynes is:
(a) Bromine water
(b) Carbon tetrachloride
(c) Alkaline KMnO₄
(d) Ammoniacal cuprous chloride

Answer

Answer: (d) Ammoniacal cuprous chloride

---

Question 12.
The correct structural formula of butanoic acid is

Answer

Answer: (d)

---

Question 13.
The soap molecule has a
(a) hydrophilic head and a hydrophobic tail
(b) hydrophobic head and a hydrophilic tail
(c) hydrophobic head and a hydrophobic tail
(d) hydrophilic head and a hydrophilic tail

Answer

Answer: (a) hydrophilic head and a hydrophobic tail

---

Question 14.
Detergents can be used for washing of clothes
(a) only in hard water
(b) only in soft water
(c) both in soft and hard water
(d) None of the above

Answer

Answer: (c) both in soft and hard water

---

Question 15.
Which among the following are unsaturated hydrocarbons?

(a) (i) and (iii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Answer

Answer: (c) (ii) and (iv)

---

Question 16.
Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that
(a) solid X is sodium hydroxide and the gas Y is CO₂
(b) solid X is sodium bicarbonate and the gas Y is CO₂
(c) solid X is sodium acetate and the gas Y is CO₂
(d) solid X is sodium bicarbonate and the gas Y is SO₂.

Answer

Answer: (b) solid X is sodium bicarbonate and the gas Y is CO₂

---

Question 17.
Structural formula of ethyne is

Answer

Answer: (a)

---

Question 18.
A student while observing the properties of acetic acid would report that this smells like
(a) vinegar and turns red litmus blue
(b) rotten egg and turns red litmus blue
(c) vinegar and turns blue litmus red
(d) rotten egg and turns blue litmus red

Answer

Answer: (c) vinegar and turns blue litmus red

---

Question 19.

In the above given reaction, alkaline KMnO₄ acts as
(a) reducing agent
(b) oxidising agent
(c) catalyst
(d) dehydrating agent

Answer

Answer: (b) oxidising agent

---

Question 20.
Vinegar is a solution of
(a) 50% – 60% acetic acid in alcohol
(b) 5% – 8% acetic acid in alcohol
(c) 5% – 8% acetic acid in water
(d) 50% – 60% acetic acid in water

Answer

Answer: (c) 5% – 8% acetic acid in water

---

Question 21.
The portion left on dropping a hydrogen atom from an alkane is called
(a) functional group
(b) alkenyl group
(c) alkyl group
(d) phenyl group

Answer

Answer: (c) alkyl group

---

Question 22.
The functional group present in a carboxylic acid is

Answer

Answer: (b)

---

Question 23.
Identify the unsaturated compounds from the following:
(i) Propane
(ii) Propene
(iii) Propyne
(iv) Chloropropane
(a) (i) and (ii)
(b) (ii) and (iv)
(c) (iii) and (iv)
(d) (ii) and (iii)

Answer

Answer: (d) (ii) and (iii)

---

Question 24.
Which of the following are correct structural isomers of butane?

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer

Answer: (c) (i) and (ii)

---

Question 25.
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
(a) helium
(b) neon
(c) argon
(d) krypton

Answer

Answer: (b) neon

---

Question 26.
Which of the following statements are usually correct for carbon compounds? These
(i) are good conductors of electricity
(ii) are poor conductors of electricity
(iii) have strong forces of attraction between their molecules
(iv) do not have strong forces of attraction between their molecules
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Answer

Answer: (d) (ii) and (iv)

---

Question 27.
Pentane has the molecular formula C₅H₁₂. It has
(a) 5 covalent bonds
(b) 12 covalent bonds
(c) 16 covalent bonds
(d) 17 covalent bonds

Answer

Answer: (c) 16 covalent bonds

---

Question 28.
How many electrons are there in the outermost orbit of carbon?
(a) Two
(b) Three
(c) One
(d) Four

Answer

Answer: (d) Four

---

Question 29.
Which of these is true for most of the organic compounds?
(a) High melting and boiling points
(b) Low melting point but high boiling point
(c) High melting point but low boiling point
(d) Low melting and boiling points

Answer

Answer: (b) Low melting point but high boiling point

---

Question 30.
Hydrocarbons are mainly composed of which of these?
(a) Hydrogen, carbon and nitrogen
(b) Hydrogen and carbon
(c) Hydrogen
(d) Hydrogen, oxygen and carbon

Answer

Answer: (b) Hydrogen and carbon

---

Question 31.
How many double bonds are there in a saturated hydrocarbon?
(a) One
(b) Two
(c) Three
(d) Zero

Answer

Answer: (d) Zero

---

Question 32.
Successive members of a homologous series vary by how many atomic mass unit?
(a) Sixteen
(b) Fourteen
(c) One
(d) Twelve

Answer

Answer: (b) Fourteen

---

Question 33.
Ethanol is also known as which of these?
(a) Formic acid
(b) Ethyl alcohol
(c) Ethane
(d) Acetaldehyde

Answer

Answer: (b) Ethyl alcohol

---

Question 34.
Ethanoic acid is also known as which of these?
(a) Citric acid
(b) Nitric acid
(c) Acetic acid
(d) Formic acid

Answer

Answer: (c) Acetic acid

---

Question 35.
Soaps are ester of which type of acids?
(a) Formic acid
(b) Fatty acid
(c) Inorganic acid
(d) Acetic acid

Answer

Answer: (b) Fatty acid

---

Question 36.
Which of these is not an organic acid?
(a) Acetic acid
(b) Tartaric acid
(c) Nitric acid
(d) Formic acid

Answer

Answer: (c) Nitric acid

---

Question 37.
Which of the following is not an allotropic form of carbon?
(a) Fluorine
(b) Fullerene
(c) Diamond
(d) Graphite

Answer

Answer: (a) Fluorine

---

Fill in the blanks

Choosing only words from the following list, write down the appropriate words to fill in the blanks from (i) to (vi) given below.

Addition, carbohydrates, C_nH_2n-2, C_nH_2n, C_nH_2n+2, electrochemical, homologous, hydrocarbons, saturated substitution, unsaturated, methane, nickel.
The alkanes form a (i) ………….. series with the general formula (ii) ………….. The alkanes are (iii) ………….. (iv) ………….. which generally undergo (v) ………….. reactions. First homologue of this series is named as ………….. (vi).

Answer

Answer:
(i) homologous
(ii) C_nH_2n+2
(iii) saturated
(iv) hydrocarbons
(v) substitution
(vi) methane

---

Give One word Answers for the following:

1. A gas which is also known as marsh gas.

Answer

Answer: Methane

---

2. Catalyst used to convert alkanes to aldehydes.

Answer

Answer: Molybdenum oxide

---

3. Used for making pickles and preservatives.

Answer

Answer: Vinegar

---

4. The category of compounds with -COOH as functional groups.

Answer

Answer: Carboxylic acid

---

5. The category of compounds with OH as functional group.

Answer

Answer: Alcohol

---

6. A white solid which on treatment with water liberates acetylene.

Answer

Answer: Calcium carbide

---

7. A reagent which can be used to distinguish between ethene and ethyne.

Answer

Answer: Ammoniacal cuprous chloride

---

8. A gas used for artificial ripening of fruits.

Answer

Answer: Ethene / Ethyne

---

9. A solution used to store biological specimen.

Answer

Answer: Formalin

---

10. Organic acid present in vinegar.

Answer

Answer: Acetic acid

---

11. The process by which bigger hydrocarbons split into smaller hydrocarbons.

Answer

Answer: Pyrolysis

---

12. The process by which hydrogen converts unsaturated compounds to saturated compounds.

Answer

Answer: Hydrogenation

---

13. The process of removal of water from organic compounds.

Answer

Answer: Dehydration

---

14. Ethyl alcohol containing methanol is known as

Answer

Answer: Spurious liquor

---

15. A gas prepared when ethyl alcohol is treated with concentrated sulphuric acid.

Answer

Answer: Ethene

---

Match the following columns

1.

Answer

Answer:
(a) – (iv)
(b) – (i)
(c) – (ii)
(d) – (iii)

---

2.

Answer

Answer:
(a) – (iv)
(b) – (iii)
(c) – (ii)
(d) – (i)

---

3.

Answer

Answer:
(a) – (ii)
(b) – (iii)
(c) – (iv)
(d) – (i)

---

4.

Answer

Answer:
(a) – (iii)
(b) – (i)
(c) – (iv)
(d) – (ii)

---

Complete the crossword below.

Across
3. First homologue of alkene series
5. The organic compounds having the same molecular formula but different structures
6. Allotrope of carbon used as glass cutter
8. Compounds of carbon and hydrogen
Down:
1. Organic compound formed by reaction of acid and alcohol
2. Self linking ability of carbon
4. Substance which has cleansing action in hard water
7. Allotrope of carbon used in lubrication

Answer

Answer:
Across:
3. Ethene
5. Isomers
6. Diamond
8. Hydrocarbons

Down:
1. Ester
2. Catenation
4. Detergent
7. Graphite

---

We hope the given NCERT MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers Pdf free download will help you. If you have any queries regarding Carbon and Its Compounds CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Metals and Non-metals Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-3/

You can refer to NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Metals and Non-metals Class 10 MCQs Questions with Answers

Metals And Non Metals Class 10 MCQ Question 1.
The ability of metals to be drawn into thin wires is known as
(a) ductility
(b) malleability
(c) sonority
(d) conductivity

Answer

Answer: (a) ductility

---

Metal And Non Metals Class 10 MCQ Question 2.
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)

Answer

Answer: (d) (i) and (iv)

---

Metals And Nonmetals Class 10 MCQ Question 3.
Due to its semiconductor properties the non-metal used in computer, T.V. etc. is
(a) Carbon
(b) Silicon
(c) Bromine
(d) Fluorine

Answer

Answer: (b) Silicon

---

Class 10 Metals And Non Metals MCQ Question 4.
What happens when calcium is treated with water?
(i) It does not react with water.
(ii) It reacts violently with water.
(iii) It reacts less violently with water.
(iv) Bubbles of hydrogen gas formed stick to the surface of calcium.
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer

Answer: (d) (iii) and (iv)

---

Class 10 Science Chapter 3 MCQ Question 5.
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
(a) H₂SO₄
(b) HCl
(c) HNO₃
(d) All of these

Answer

Answer: (c) HNO₃

---

Metals And Non Metals MCQ Question 6.
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu
(a) (i) and (iv)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (i) and (ii)

Answer

Answer: (d) (i) and (ii)

---

Ch 3 Science Class 10 MCQ Question 7.
An alloy reacted with dilute hydrochloric acid to produce a gas which ‘pops’ a lighted splint. The residue reacted with dilute nitric acid to form a blue solution. Which one of the following pairs of metals is present in the alloy?
(a) Copper and lead
(b) Lead and magnesium
(c) Copper and magnesium
(d) Lead and zinc

Answer

Answer: (c) Copper and magnesium

---

Class 10 Science Ch 3 MCQ Question 8.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Answer

Answer: (c) (ii) and (iv)

---

MCQ On Metals And Non Metals Class 10 Question 9.
Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining?
(i) Au
(ii) Cu
(iii) Na
(iv) K
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (iii)and (iv)

Answer

Answer: (a) (i) and (ii)

---

Metal And Non Metals MCQ Class 10 Question 10.
Metal M occurs in the Earth’s crust as its oxide M₂O₃. An alloy of this metal is used in making aircrafts. The ore of the metal M is
(a) magnetite
(b) haematite
(c) bauxite
(d) pyrolusite

Answer

Answer: (c) bauxite

---

MCQ On Metals And Non Metals Question 11.
Which one of the following four metals would be displaced from the solution of its salts by other three metals?
(a) Mg
(b) Ag
(c) Zn
(d) Cu

Answer

Answer: (b) Ag

---

Metal And Non Metal Class 10 MCQ Question 12.
2 mL each of concentrated HCl, HNO₃ and a mixture of concentrated HCl and concentrated HNO₃ in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
(a) Al
(b) Au
(c) Cu
(d) Pt

Answer

Answer: (b) Au

---

MCQ Questions For Class 10 Science Chapter 3 Question 13.
Which one of the following figures correctly describes the process of electrolytic refining?

Answer

Answer: (c)

---

MCQ Of Metal And Nonmetal Class 10 Question 14.
An element A is soft and can be cut with a knife. This is very reactive to air and cannot be kept in open. It reacts vigorously with water. Identify the element from the following:
(a) Mg
(b) Na
(c) P
(d) Ca

Answer

Answer: (b) Na

---

Chapter 3 Science Class 10 MCQ Question 15.
Alloys are homogeneous mixtures of a metal with a metal or non-metal. Which among the following alloys contain non-metal as one of its constituents?
(a) Brass
(b) Bronze
(c) Amalgam
(d) Steel

Answer

Answer: (d) Steel

---

Question 16.
Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid

Answer

Answer: (b) Has low melting point

---

Question 17.
The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 and Z – 2, 8, 2. Which of the following is correct?
(a) X is a metal.
(b) Y is a metal.
(c) Z is a non-metal.
(d) Y is a non-metal and Z is a metal.

Answer

Answer: (d) Y is a non-metal and Z is a metal.

---

Question 18.
Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?
(a) Diamond
(b) Graphite
(c) Sulphur
(d) Fullerene

Answer

Answer: (b) Graphite

---

Question 19.
Which of the following can undergo a chemical reaction?
(a) MgSO₄ + Fe
(b) ZnSO₂ + Fe
(c) MgSO₂ + Pb
(d) CuSO₂ + Fe

Answer

Answer: (d) CuSO₂ + Fe

---

Question 20.
The atomic numbers of four elements A, B, C and D are 6, 8, 10 and 12 respectively. The two elements which can react to form ionic bonds (or ionic compound) are:
(a) A and D
(b) B and C
(c) A and C
(d) B and D

Answer

Answer: (d) B and D

---

Question 21.
The atomic number of an element X is 19. The number of electrons in its ion X⁺ will be:
(a) 18
(b) 19
(c) 20
(d) 21

Answer

Answer: (a) 18

---

Question 22.
The atomic number of an element Y is 17. The number of electrons in its ion Y^– will be:
(a) 17
(b) 18
(c) 19
(d) 20

Answer

Answer: (b) 18

---

Question 23.
Which of the following is an iron ore?
(a) Cinnabar
(b) Calamine
(c) Haematite
(d) Rock salt

Answer

Answer: (c) Haematite

---

Question 24.
The metal which can be extracted from the bauxite ore is:
(a) Na
(b) Mn
(c) Al
(d) Hg

Answer

Answer: (c) Al

---

Question 25.
In stainless steel alloy, iron metal is mixed with:
(a) Cu and Cr
(b) Cr and Ni
(c) Cr and Sn
(d) Cu and Ni

Answer

Answer: (b) Cr and Ni

---

Question 26.
Which of the following is an ore of mercury metal?
(a) Rock salt
(b) Cinnabar
(c) Calamine
(d) Haematite

Answer

Answer: (b) Cinnabar

---

Question 27.
Which of the following pair of metals exist in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag

Answer

Answer: (d) Au and Ag

---

Question 28.
Which of the following alloys contains a non-metal as one of the constituents?
(a) Brass
(b) Amalgam
(c) Steel
(d) Bronze

Answer

Answer: (c) Steel

---

Question 29.
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnes

Answer

Answer: (c) mercury

---

Question 30.
Rock salt is an ore of one of the following metals. This metal is:
(a) Mn
(b) Na
(c) Fe
(d) Cu

Answer

Answer: (b) Na

---

Fill in the blanks

1. The process in which the concentrated ore is heated below its melting point in the absence or limited supply of air is called …………….

Answer

Answer: Calcination

---

2. Metal have ……………. melting and boiling points.

Answer

Answer: high

---

3. ……………. displaces copper from a solution of copper (II) sulphate.

Answer

Answer: Zinc

---

4. Removal of impurities from a metal by chemical method is called …………….

Answer

Answer: leaching

---

5. Oxides of non-metals when dissolved in water generally give ……………. solutions.

Answer

Answer: acidic

---

6. A sulphide ore is concentrated by …………….

Answer

Answer: froth flotation process

---

7. The chlorides of non-metals are …………….

Answer

Answer: covalent

---

8. Non-metals are ……………. in character.

Answer

Answer: electronegative

---

9. The impurities in the ores are removed by adding …………….

Answer

Answer: flux

---

10. The rocky material found along with ores is known as …………….

Answer

Answer: gangue

---

Match the following columns

Four substances have the following electrical properties. What are these four substances?

Substance	Electrical property
W	Does not conduct under any conditions
X	Conducts only in aqueous solution
Y	Conducts in both the molten and solid
Z	Conducts in both the molten and aqueous

1.

Column I	Column II
(a) W	(p) NaCl
(b) X	(q) Pb
(c) Y	(r) S
(d) Z	(s) HCl

Answer

Answer:

Column I	Column II
(a) W	(r) S
(b) X	(s) HCl
(c) Y	(q) Pb
(d) Z	(p) NaCl

---

2.

Column I	Column II
(a) Hydraulic washing	(p) Difference in solubility of gangue and ore particles in a specific substance
(b) Magnetic separation	(q) Difference in wetting property of gangue and ore particles.
(c) Froth flotation	(r) Difference in gravities of ore and gangue particles
(d) Leaching	(s) Difference in magnetic properties of ore and gangue particles

Answer

Answer:

Column I	Column II
(a) Hydraulic washing	(r) Difference in gravities of ore and gangue particles
(b) Magnetic separation	(s) Difference in magnetic properties of ore and gangue particles
(c) Froth flotation	(q) Difference in wetting property of gangue and ore particles.
(d) Leaching	(p) Difference in solubility of gangue and ore particles in a specific substance

---

3.

Column I	Column II
(a) Haematite	(p) Carbonate
(b) Camallite	(q) Oxide
(c) Dolomite	(r) Sulphate
(d) Anglesite	(s) Chloride

Answer

Answer:

Column I	Column II
(a) Haematite	(q) Oxide
(b) Camallite	(s) Chloride
(c) Dolomite	(p) Carbonate
(d) Anglesite	(r) Sulphate

---

Complete the crossword given below.

Across
3. A homogeneous mixture of two or more metals
5. An alloy of copper and zinc
6. Property of metal due to which metal produce a sound on striking a hard surface
7. Lustrous non-metal
Down
1. Metal which melt if you keep them on your palm
2. A phenomenon by which a metal get corroded when they are exposed to moist air
4. Substance from which metal can be extracted by metallurgy
6. Metal which can be cut with knife

Answer

Answer:
Across:
3. Alloy
5. Brass
6. Sonorous
7. Iodine

Down:
1. Caesium
2. Corrosion
4. Ore
6. Sodium

---

We hope the given NCERT MCQ Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Pdf free download will help you. If you have any queries regarding Metals and Non-metals CBSE Class 10 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

Check the below NCERT MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers Pdf free download. MCQ Questions for Class 10 Science with Answers were prepared based on the latest exam pattern. We have Provided Acids, Bases and Salts Class 10 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-10-science-chapter-2/

You can refer to NCERT Solutions for Class 10 Science Chapter 2 Acids, Bases and Salts to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.

Acids, Bases and Salts Class 10 MCQs Questions with Answers

Acid Bases And Salts Class 10 MCQ Question 1.
What happens when a solution of an acid is mixed with a solution of a base in a test tube?
(i) The temperature of the solution increases
(ii) The temperature of the solution decreases
(iii) The temperature of the solution remains the same
(iv) Salt formation takes place
(a) (i) only
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (i) and (iv)

Answer

Answer: (d) (i) and (iv)

---

Acids Bases And Salts Class 10 MCQ Question 2.
An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid

Answer

Answer: (d) Hydrochloric acid

---

Class 10 Science Chapter 2 MCQ Question 3.
Two aqueous solutions P and Q have pH of 5 and 13 respectively. The correct inference is that:
(a) solution P is of HCl and Q is of NH₄OH
(b) solution P is of CH₃COOH and Q is of Ca(OH)₂
(c) solution P is of HNO₃ and Q is of NH₄OH
(d) solution P is of CH₃COOH and Q is of NaOH

Answer

Answer: (d) solution P is of CH₃COOH and Q is of NaOH

---

Acid Base And Salts Class 10 MCQ Question 4.
The pH of a solution is 7. How can you increase its pH?
(a) By adding a small amount of acid
(b) By adding a small amount of base.
(c) By adding a small amount of salt.
(d) By passing carbon dioxide gas through it.

Answer

Answer: (b) By adding a small amount of base.

---

Class 10 Acids Bases And Salts MCQ Question 5.
Sodium carbonate is a basic salt because it is a salt of
(a) strong acid and strong base
(b) weak acid and weak base
(c) strong acid and weak base
(d) weak acid and strong base

Answer

Answer: (d) weak acid and strong base

---

MCQ Of Acid Base And Salts Class 10 Question 6.
Which gas is evolved when acids react with metals?
(a) O₂
(b) CO₂
(c) H₂
(d) N₂

Answer

Answer: (c) H₂

---

Ch 2 Science Class 10 MCQ Question 7.
A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish- blue?
(a) Lemon juice
(b) Vinegar
(c) Common salt
(d) An antacid

Answer

Answer: (d) An antacid

---

Class 10 Science Ch 2 MCQ Question 8.
Which of the following gives the correct increasing order of acidic strength?
(a) Water < Acetic acid < Hydrochloric acid
(b) Water < Hydrochloric acid < Acetic acid
(c) Acetic acid < Water < Hydrochloric acid
(d) Hydrochloric acid < Water < Acetic acid

Answer

Answer: (a) Water < Acetic acid < Hydrochloric acid

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MCQ Questions For Class 10 Science Chemistry Chapter 2 Question 9.
If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?
(a) Wash the hand with saline solution.
(b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.
(c) After washing with plenty of water and apply solution of sodium hydroxide on the hand.
(d) Neutralise the acid with a strong alkali.

Answer

Answer: (b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate.

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Acids Bases And Salts MCQ Question 10.
Farmers neutralise the effect of acidity of the soil by adding
(a) slaked lime
(b) gypsum
(c) caustic soda
(d) baking soda

Answer

Answer: (a) slaked lime

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MCQ Questions For Class 10 Science Chapter 2 Question 11.
A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for the identification?
(a) Blue litmus
(b) Red litmus
(c) Sodium carbonate solution
(d) Dilute hydrochloric acid

Answer

Answer: (b) Red litmus

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Chapter 2 Science Class 10 MCQ Question 12.
One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is
(a) hydrochloric acid
(b) tartaric acid
(c) acetic acid
(d) sulphuric acid

Answer

Answer: (b) tartaric acid

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Class 10 Chemistry Chapter 2 MCQ Question 13.
Increase in the OH^– ion concentration, leads to
(a) an increases in the pH of solution
(b) a decrease in the pH of the solution
(c) doesn’t alter the pH of the solution
(d) decreases the basic strength of the solution

Answer

Answer: (a) an increases in the pH of solution

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Class 10 Acid Base And Salt MCQ Question 14.
Which of the following statements is correct about an aqueous solution of an acid and of a base?
(i) Higher the pH, stronger the acid
(ii) Higher the pH, weaker the acid
(iii) Lower the pH, stronger the base
(iv) Lower the pH, weaker the base
(a) (i) and (iii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (ii) and (iv)

Answer

Answer: (iv) Lower the pH, weaker the base

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MCQ On Acids Bases And Salts Class 10 Question 15.
A solution has turned the colour of red litmus paper to blue. The pH of the solution is approximately:
(a) 2
(b) 5
(c) 7
(d) 10

Answer

Answer: (d) 10

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Class 10 Chapter 2 Science MCQ Question 16.
The pH of three solutions X, Y and Z is 6, 4 and 8 respectively. Which of the following is the correct order of acidic strength?
(a) X > Y > Z
(b) Z > Y > X
(c) Y > X > Z
(d) Z > X > Y

Answer

Answer: (c) Y > X > Z

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Question 17.
Which one of the following can be used as an acid-base indicator by a visually impaired student?
(a) Litmus
(b) Turmeric
(c) Vanilla essence
(d) Petunia leaves

Answer

Answer: (c) Vanilla essence

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Question 18.
What is gastric acid present in the stomach composed of?
(a) Hydrochloric acid
(b) Sulphuric acid
(c) Nitric acid
(d) Lactic acid

Answer

Answer: (a) Hydrochloric acid

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Question 19.
Which of the following is acidic in nature?
(a) Lime juice
(b) Human blood
(c) Lime water
(d) Antacid

Answer

Answer: (a) Lime juice

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Question 20.
When the solution of an acid is diluted, what will be the change in pH of the solution?
(a) pH of the solution remains the same
(b) pH of the solution will increase
(c) pH of the solution decreases
(d) pH of the solution climbs to 7

Answer

Answer: (a) pH of the solution remains the same

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Question 21.
When the stopper of a bottle containing colourless liquid was removed, the bottle gave a smell like that of vinegar. The liquid in the bottle could be
(a) Hydrochloric acid solution
(b) Sodium hydroxide solution
(c) Acetic acid solution
(d) Saturated sodium bicarbonate solution

Answer

Answer: (a) Hydrochloric acid solution

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Question 22.
Which of the following is not a mineral acid?
(a) Hydrochloric acid
(b) Citric acid
(c) Sulphuric acid
(d) Nitric acid

Answer

Answer: (b) Citric acid

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Question 23.
Which among the following is not a base?
(a) NaOH
(b) KOH
(c) NH₄OH
(d) C₂H₅OH

Answer

Answer: (d) C₂H₅OH

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Question 24.
To protect tooth decay, one is advised to brush the teeth regulary. The ingredient of the paste which checks tooth decay is:
(a) acidic
(b) basic
(c) neutral
(d) corrosive

Answer

Answer: (b) basic

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Question 25.
Match the chemical substances given in Column (A) with their appropriate application given in Column (B).

Column I	Column II
(A) Bleaching powder	(i) Preparation of glass
(B) Baking soda	(ii) Production of H2 and Cl2
(C)Washing soda	(iii) Decolourisation
(D) Sodium chloride	(iv) Antacid

(a) A-(ii), B-(i), C-(iv), D-(iii)
(b) A-(iii), B-(ii), C-(iv), D-(i)
(c) A-(iii), B-(iv), C-(i), D-(ii)
(d) A-(ii), B-(iv), C-(i), D-(iii)

Answer

Answer: (c) A-(iii), B-(iv), C-(i), D-(ii)

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Fill in the blanks

1. A solution turns red litmus blue, its pH is likely to be …………….

Answer

Answer: greater than 7

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2. Plaster of Paris is made from …………….

Answer

Answer: gypsum

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3. Phenolphthalein is ……………. in acidic solution.

Answer

Answer: colourless

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4. An example of double salt is …………….

Answer

Answer: Mohr’s salt

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5. Bleaching powder can be prepared by reacting …………….

Answer

Answer: slaked lime with chlorine

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6. Hardness of water is removed by …………….

Answer

Answer: washing soda

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7. ……………. is a deliquescent solid.

Answer

Answer: Caustic soda

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8. The colour of methyl orange in basic medium is …………….

Answer

Answer: yellow

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9. Boric acid is a ……………. acid.

Answer

Answer: monobasic

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10. The process of formation of salt and water when an acid reacts with a base is called …………….

Answer

Answer: neutralisation

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Match the following columns

1.

Column I	Column II
(a) Sodium carbonate	(P) Fire-proofing material
(b) Plaster of Paris	(q) Use for faster cooking
(c) Bleaching powder	(r) Softening hard water
(d) Baking soda	(s) Textile industry

Answer

Answer:

Column I	Column II
(a) Sodium carbonate	(r) Softening hard water
(b) Plaster of Paris	(P) Fire-proofing material
(c) Bleaching powder	(s) Textile industry
(d) Baking soda	(q) Use for faster cooking

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2.

Column I	Column II
(a) Baking soda	(p) NaCl
(b) Plaster of Paris	(q) NaHCO3
(c) Washing soda	(r) CaSO4 . 1/2 H2O.
(d) Common salt	(s) Na2CO3

Answer

Answer:

Column I	Column II
(a) Baking soda	(q) NaHCO3
(b) Plaster of Paris	(r) CaSO4 . 1/2 H2O.
(c) Washing soda	(s) Na2CO3
(d) Common salt	(p) NaCl

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3.

Column I	Column II
(a) Mixed salts	(p) CaCO3 MgCO3
(b) Double salts	(q) NaKCO3
(c) Basic salts	(r) NaHSO4
(d) Acidic salts	(s) CH3COONa

Answer

Answer:

Column I	Column II
(a) Mixed salts	(q) NaKCO3
(b) Double salts	(p) CaCO3 MgCO3
(c) Basic salts	(s) CH3COONa
(d) Acidic salts	(r) NaHSO4

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Complete the crossword below.

Across
4. A synthetic indicator
6. Substance formed by hydration of plaster of Paris
7. A herbaceous plant with stinging hairs
8. Solution with pH less than 7
Down
1. Gas released by chemical reaction of zinc and sodium hydroxide
2. Reaction between acid and base
3. A substance that changes red litmus to blue
5. Medicine used during indigestion

Answer

Answer:
Down:
1. Hydrogen
2. Neutralisation
3. Base
5. Antacid

Across:
4. Phenolphthalein
6. Gypsum
7. Nettle
8. Acid

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