Check the below NCERT MCQ Questions for Class 8 Science Chapter 6 Combustion and Flame with Answers Pdf free download. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. We have provided Combustion and Flame Class 8 Science MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-8-science-chapter-6/
You can refer to NCERT Solutions for Class 8 Science Chapter 6 Combustion and Flame to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams.
Combustion and Flame Class 8 MCQs Questions with Answers
Choose the correct option in the following questions:
Combustion And Flame Class 8 MCQ Question 1.
Which one of the following gases is used in combustion?
(a) Hydrogen
(b) Oxygen
(c) Nitrogen
(d) Carbon dioxide
Answer
Answer: (b) Oxygen
Class 8 Science Chapter 6 MCQ Question 2.
The burning of LPG is an example of
(a) rapid combustion
(b) spontaneous combustion
(c) slow combustion
(d) explosion
Answer
Answer: (a) rapid combustion
Class 8 Science Ch 6 MCQ Question 3.
A temperature at which the substance burns is called
(a) melting
(b) boiling temperature
(c) kindling temperature
(d) evaporation
Answer
Answer: (c) kindling temperature
MCQ Questions For Class 8 Science Chapter 6 Question 4.
Which is non-renewable source of energy’?
(a) Natural gas
(b) Wind energy
(c) Tidal energy
(d) Mechanical energy
Answer
Answer: (a) Natural gas
Class 8 Chapter 6 Science MCQ Question 5.
Which of the following is not a fossil fuel?
(a) Coal
(b) Petroleum
(c) Natural gas
(d) Water gas
Answer
Answer: (d) Water gas
Ch 6 Science Class 8 MCQ Question 6.
Which gas helps in the process of combustion?
(a) Cooking gas
(b) Nitrogen gas
(c) Oxygen gas
(d) Producer gas
Answer
Answer: (c) Oxygen gas
MCQ Of Combustion And Flame Class 8 Question 7.
The amount of heat energy produced on complete combustion of 1 kg of a fuel is called
(a) calorific value
(b) significant value
(c) heat value
(d) internal energy
Answer
Answer: (a) calorific value
Class 8 Combustion And Flame MCQ Question 8.
Which zone represents the partial combustion in candle flame?
(a) Outer zone
(b) Middle zone
(c) Inner zone
(d) Lower zone
Answer
Answer: (b) Middle zone
Combustion And Flame MCQ Question 9.
Burning coal in a closed room will produce
(a) nitrogen oxides
(b) carbon dioxide
(c) carbon monoxide
(d) oxygen
Answer
Answer: (c) carbon monoxide
Chapter 6 Science Class 8 MCQ Question 10.
Substances which catch fire are called
(a) acids
(b) bases
(c) combustible
(d) burners
Answer
Answer: (c) combustible
Class 8 Ch 6 Science MCQ Question 11.
Out of these, which is able to control fires?
(a) NH3
(b) H2
(c) CO2
(d) F2
Answer
Answer: (c) CO2
Class 8 Chapter 6 MCQ Science Question 12.
Which zone of a flame does a goldsmith use for melting gold and silver ?
(a) Outer zone
(b) Middle zone
(c) Inner zone
(d) Lower zone
Answer
Answer: (a) Outer zone
Science Class 8 Chapter 6 MCQ Question 13.
Calorific value of a fuel is expressed in
(a) kilojoule per kilogram
(b) kilojoule per gram
(c) joule per milligram
(d) kilojoule per milligram
Answer
Answer: (a) kilojoule per kilogram
MCQ For Class 8 Science Chapter 6 Question 14.
Which is non-combustible substance?
(a) Wood
(b) Paper
(c) Iron nails
(d) Straw
Answer
Answer: (c) Iron nails
MCQ On Combustion And Flame Class 8 Question 15.
Acid rain contains mainly
(a) oxygen and nitrogen gas
(b) fluorine and chlorine gas
(c) magnesium oxide
(d) nitrogen oxide and sulphur dioxide
Answer
Answer: (d) nitrogen oxide and sulphur dioxide
Match the following items given in Column A’ with that in Column ‘B’.
| Column A | Column B |
| Fire extinguisher | Burning of candle |
| Slow oxidation | Renewable source |
| Kindling temperature | Natural gas |
| Tidal energy | Cooking gas |
| Fossil fuel | Inflammable |
| Oxygen gas | Burning starts |
| LPG | Carbon dioxide |
| Alcohol | Supporter of combustion |
Answer
Answer:
| Column A | Column B |
| Fire extinguisher | Carbon dioxide |
| Slow oxidation | Burning of candle |
| Kindling temperature | Burning starts |
| Tidal energy | Renewable source |
| Fossil fuel | Natural gas |
| Oxygen gas | Supporter of combustion |
| LPG | Cooking gas |
| Alcohol | Inflammable |
Fill in the blanks with appropriate words:
1. ………… of fuel forms poisonous carbon monoxide gas.
Answer
Answer: Incomplete combustion
2. ………… is expressed in terms of its calorific value.
Answer
Answer: Fuel efficiency
3. ………… have very low ignition temperature.
Answer
Answer: Inflammable substances
4. ………… is essential for combustion.
Answer
Answer: Oxygen (in air)
5. The substances, which burn in air, are called …………
Answer
Answer: combustible
6. ………… is better domestic fuel than wood.
Answer
Answer: LPG
7. Goldsmith uses the ………… zone of the flame for melting gold and silver.
Answer
Answer: outermost
State whether the statement given below are True or False.
1. Food is a fuel for our body.
Answer
Answer: True
2. Burning of charcoal produces flame with four distinct zones.
Answer
Answer: False
3. The fuel can be only liquid in nature.
Answer
Answer: False
4. Sun produces heat and light because of combustion.
Answer
Answer: False
5. It is easy to burn a piece of wood through matchstick.
Answer
Answer: False
6. Soda acid fire extinguisher contains sodium bicarbonate + dil. Sulphuric acid.
Answer
Answer: True
7. The inner central dark zone of a candle flame is the hottest region.
Answer
Answer: False
8. The principle of all fire-extinguisher is to cut off the air supply and to cool the burning substance below its ignition temperature.
Answer
Answer: True
We hope the given NCERT MCQ Questions for Class 8 Science Chapter 6 Combustion and Flame with Answers Pdf free download will help you. If you have any queries regarding Combustion and Flame CBSE Class 8 Science MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.