MCQ Questions

MCQ Questions for Class 11 Biology Chapter 3 Plant Kingdom with Answers

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Check the below NCERT MCQ Questions for Class 11 Biology Chapter 3 Plant Kingdom with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have provided Plant Kingdom Class 11 Biology MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-11-biology-chapter-3/

Plant Kingdom Class 11 MCQs Questions with Answers

Plant Kingdom Class 11 MCQ Question 1.
Rhodophyceae is called red algae because of the pigment
(a) Fucoxanthin
(b) Phycoerythrin
(c) Carotenoids
(d) Chlorophyll c

Answer

Answer: (b) Phycoerythrin
Explanation:
Members of Rhodophyceae are commonly called red algae because of the predominance of the red pigment, r-phycoerythrin in their body.

Class 11 Biology Chapter 3 MCQ Question 2.
Which of the followings plant material is an efficient water imbibant?
(a) Agar
(b) Cellulose
(c) Lignin
(d) Pectin

Answer

Answer: (a) Agar

Plant Kingdom MCQ Class 11 Question 3.
In a monoecious plant
(a) Male and female sex organs are on the same individual
(b) Male and female gametes are of two morphologically distinct types
(c) Male and female sex organs are on different individuals
(d) All the stamens are fused to form one unit

Answer

Answer: (a) Male and female sex organs are on the same individual

MCQ Questions For Class 11 Biology Chapter 3 Question 4.
The seedless vascular plants whose sporophytes are larger than their small and independent gametophytes are
(a) Pteridophytes
(b) Angiosperms
(c) Gymnosperms
(d) None of these

Answer

Answer: (a) Pteridophytes

MCQ Of Plant Kingdom Class 11 Question 5.
Which of the following is a liverwort?
(a) Sphagnum
(b) Funaria
(c) Marchantia
(d) Polytrichum

Answer

Answer: (c) Marchantia
Explanation:
Marchantia is a liverwort.
Sphagnum, Funaria and Polytrichum are mosses.

Chapter 3 Biology Class 11 MCQs Question 6.
Transgenic plants are the ones
(a) Grown in artificial medium after hybridization in the field
(b) Produced by a somatic embryo in artificial medium
(c) Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell
(d) Produced after protoplast fusion in artificial medium

Answer

Answer: (c) Generated by introducing foreign DNA in to a cell and regenerating a plant from that cell

MCQ On Plant Kingdom Class 11 Question 7.
Which of the following plants is used extensively for the study of photosynthesis?
(a) Amaranthus
(b) Asparagus
(c) Chlorella
(d) Sunflower

Answer

Answer: (c) Chlorella

MCQs Of Biology Class 11 Chapter 3 Question 8.
Which of the following is used to grow microbes?
(a) Laminaria
(b) Gelidium
(c) Chlorella
(d) Sargassum

Answer

Answer: (b) Gelidium
Explanation:
Agar is extracted from Gelidium and Gracilaria, it is used to grow microbes and in preparation of ice-cream and jellies.

Class 11 Plant Kingdom MCQ Question 9.
Isogamous condition with non-flagellated gametes is found in
(a) Chlamydomonas
(b) Spirogyra
(c) Volvox
(d) Fucus

Answer

Answer: (b) Spirogyra

Ch 3 Bio Class 11 MCQ Question 10.
Gymnosperms produce neither flower nor fruit because they do not possess
(a) Embryo
(b) Ovary
(c) Ovule
(d) Seed

Answer

Answer: (b) Ovary

MCQ Of Chapter 3 Biology Class 11 Question 11.
Rhodophyceae is called red algae because of the pigment
(a) Fucoxanthin
(b) Phycoerythrin
(c) Carotenoids
(d) Chlorophyll c

Answer

Answer: (b) Phycoerythrin
Explanation:
Members of Rhodophyceae are commonly called red algae because of the predominance of the red pigment, r-phycoerythrin in their body.

Class 11 Bio Ch 3 MCQ Question 12.
In moss stomata appears on
(a) Capsule
(b) Leaves
(c) Stem
(d) All of these

Answer

Answer: (a) Capsule

Plant Kingdom Class 11 MCQ With Answers Question 13.
The gametophyte is not an independent, free-living generation in
(a) Pinus
(b) Polytrichum
(c) Adiantum
(d) Marchantia

Answer

Answer: (a) Pinus

Class 11 Bio Chapter 3 MCQ Question 14.
In gymnosperms, the development of pollen grains occurs in
(a) Strobili
(b) Microsporangia
(c) Megasporangia
(d) Macrosporangia

Answer

Answer: (b) Microsporangia
Explanation:
In gymnosperms, the development of pollen grains occur in microsporangia.

MCQ Plant Kingdom Class 11 Question 15.
Ribbon shaped chloroplasts occur in
(a) Ulothrix
(b) Spirogyra
(c) Chlamydomonas
(d) Riccia

Answer

Answer: (b) Spirogyra

Question 16.
Antheridia and Archegonia are sex organs of
(a) Moss
(b) Mucor
(c) Spirogyra
(d) Puccinia

Answer

Answer: (a) Moss

Question 17.
Iodine is found in
(a) Spirogyra
(b) Laminaria
(c) Polysiphonia
(d) Chlorella

Answer

Answer: (b) Laminaria

Question 18.
Bryophytes are called amphibians of plant kingdom because
(a) These plants live in soil and depend on marine organisms for asexual reproduction.
(b) These plants live in soil and depend on water for sexual reproduction.
(c) These plants live in water and depend on land animals for sexual reproduction.
(d) These plants live near water bodies.

Answer

Answer: (b) These plants live in soil and depend on water for sexual reproduction.
Explanation:
Bryophytes are called amphibians of plant Kingdom because they live in soil and depend on water for sexual reproduction.
They usually occur in damp humid and shaded areas.

Question 19.
Which one of the following is a vascular cryptogram?
(a) Cedrus
(b) Equisetum
(c) Ginkgo
(d) Marchantia

Answer

Answer: (b) Equisetum

Question 20.
Pinus differs from mango in having
(a) Tree habit
(b) Green leaves
(c) Ovules not enclosed in ovary
(d) Wood

Answer

Answer: (c) Ovules not enclosed in ovary

We hope the given NCERT MCQ Questions for Class 11 Biology Chapter 3 Plant Kingdom with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Biology Plant Kingdom MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

MCQ Questions for Class 11 Biology Chapter 2 Biological Classification with Answers

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Check the below NCERT MCQ Questions for Class 11 Biology Chapter 2 Biological Classification with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have provided Biological Classification Class 11 Biology MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-11-biology-chapter-2/

Biological Classification Class 11 MCQs Questions with Answers

Biological Classification Class 11 MCQ Question 1.
The two kingdom Classification was given by
(a) c.linnaeus
(b) john ray
(c) huxley
(d) whittaker

Answer

Answer: (c) huxley

Biological Classification MCQ Question 2.
Choose the correct pair.
(a) Parasitic fungi – feeds on plants and animals
(b) Saprotrophic fungi – feeds on dead and decaying organic matter
(c) Symbiotic fungi – mycorrhiza
(d) All of the above are true

Answer

Answer: (d) All of the above are true
Explanation:
Saprotrophic fungi feeds on dead and decaying organic matter.
Parasitic fungi feeds on animals and plants.
Symbiotic fungi are of two types mycorrhiza and lichens.
Mycorrhiza – the fungus is in close association with roots of higher plants.
Lichens – fungi is in close relationship with algae.

Class 11 Biology Chapter 2 MCQ Question 3.
Which of the following is used in biochemical and genetic work?
(a) Claviceps
(b) Aspergillus
(c) Neurospora
(d) Mucor

Answer

Answer: (c) Neurospora
Explanation:
Neurospora is used in biochemical and genetic work, it belongs to class Ascomycetes.

MCQ Questions For Class 11 Biology Chapter 2 Question 4.
If a scientist has to names a similar species he should study the
(a) Holotype
(b) syntype
(c) mesotype
(d) isotype

Answer

Answer: (d) isotype

Biological Classification MCQ Class 11 Question 5.
Which of the following is not a viral disease?
(a) AIDS
(b) Herpes
(c) Tuberculosis
(d) Smallpox

Answer

Answer: (c) Tuberculosis
Explanation:
AIDS, herpes and smallpox are viral diseases.
Tuberclosis is a bacterial disease.

MCQ On Biological Classification Class 11 Question 6.
Choose the correct match.
(a) Photosynthetic autotrophs – Nutrient recycling
(b) Chemosynthetic autotrophs – Nitrogen fixation
(c) Heterotrophic bacteria – Production of antibiotics
(d) Mycoplasma – Production of curd

Answer

Answer: (c) Heterotrophic bacteria – Production of antibiotics
Explanation:
Photosynthetic autotrophs helps in fixing atmospheric nitrogen.
Chemosynthetic autotrophs helps in nutrient recycling.
Heterotrophic bacteria helps in making curd, production of antibiotics, etc.

MCQs Of Biology Class 11 Chapter 2 Question 7.
The scientist who created the group protista for both unicellular plants and animals is
(a) haecke
(b) pasteur
(c) lister
(d) koch

Answer

Answer: (a) haecke

MCQ Of Biological Classification Class 11 Question 8.
Binomial nomenclature was given by
(a) huxley
(b) ray
(c) darwin
(d) linnaeus

Answer

Answer: (d) linnaeus

Chapter 2 Biology Class 11 MCQs Question 9.
Which of the following is an indicator of air pollution?
(a) Mycorrhiza
(b) Agaricus
(c) Lichens
(d) Common mushrooms

Answer

Answer: (c) Lichens
Explanation:
Lichens are the indicators of air pollution.
Lichens are the association between fungi and algae. They do not grow in polluted areas.

Ch 2 Bio Class 11 MCQ Question 10.
The natural system of Classification is based on
(a) morphology
(b) evolutionary trend
(c) anatomy
(d) all of the above

Answer

Answer: (d) all of the above

Class 11 Bio Chapter 2 MCQ Question 11.
Potato spindle tuber disease is caused by
(a) Phycobionts
(b) Virus
(c) Bacteria
(d) Viroids

Answer

Answer: (d) Viroids
Explanation:
In 1971, Diener discovered a new infectious agents called Viroids that was smaller than viruses.
These viroids causes potato spindle tuber disease.

MCQ Of Chapter 2 Biology Class 11 Question 12.
Quinine is obtained from
(a) Puccinia
(b) Neurospora
(c) Gonyaulax
(d) Cinchona

Answer

Answer: (a) Puccinia
Explanation:
Quinine is obtained from Cinchona officinalis.

Class 11 Biological Classification MCQ Question 13.
According to five-kingdom classification, which of the following does not contain nuclear membrane?
(a) Protista
(b) Monera
(c) Fungi
(d) Animalia

Answer

Answer: (b) Monera
Explanation:
According to five kingdom classification, Monera does not contain nuclear membrane.

Biology Class 11 Chapter 2 MCQs Question 14.
Two organisms of the same class but different families will be kept under the same
(a) genera
(b) species
(c) order
(d) family

Answer

Answer: (c) order

Class 11 Bio Ch 2 MCQ Question 15.
Bacteria that live in hot springs are called
(a) Halophiles
(b) Thermoacidophiles
(c) Methanogens
(d) None of the above

Answer

Answer: (b) Thermoacidophiles
Explanation:
The bacteria that live in hot springs are called thermoacidophiles.
Bacteria that live in salty areas are called halophiles.
Bacteria that live in marshy areas are called methanogens.

Question 16.
Which amongst kingdom animalia has become recently extinct?
(a) snow leopard
(b) indian macaque
(c) cheetah
(d) tiger

Answer

Answer: (c) cheetah

Question 17.
Red tides in sea appear due to
(a) Euglena
(b) Chrysophytes
(c) Dinoflagellates
(d) Diatoms

Answer

Answer: (c) Dinoflagellates
Explanation:
Red tides in sea appear is due to red dinoflagellates.
Gonyaulax undergoes rapid multiplication and makes the sea apear red.

Question 18.
The asexual spores are not found, vegetative reproduction occurs by fragmentation and sexual organs are absent. Identify the class of fungi.
(a) Phycomycetes
(b) Ascomycetes
(c) Basidiomycetes
(d) Deuteromycetes

Answer

Answer: (c) Basidiomycetes
Explanation:
In basidiomycete asexual spores are not found and vegetative reproduction occurs by fragmentation.
Sex organs are absent in this class of fungi.

Question 19.
Match the columns:
1. Basidiomycetes – A. Agaricus
2. Ascomycetes – B. Albugo
3. Phycomycetes – C. Trichoderma
4. Deuteromycetes – D. Saccharomyces
(a) 1-D, 2-A, 3-B, 4-C
(b) 1-A, 2-D, 3-B, 4-C
(c) 1-A, 2-B, 3-D, 4-C
(d) 1-C, 2-D, 3-A, 4-B

Answer

Answer: (b) 1-A, 2-D, 3-B, 4-C

Question 20.
Trypanosoma causes
(a) Dysentry
(b) Mumps
(c) Sleeping sickness
(d) Cholera

Answer

Answer: (c) Sleeping sickness
Explanation:
Trypanosoma causes sleeping sickness.

We hope the given NCERT MCQ Questions for Class 11 Biology Chapter 2 Biological Classification with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Biology Biological Classification MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

MCQ Questions for Class 11 Biology Chapter 1 The Living World with Answers

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Check the below NCERT MCQ Questions for Class 11 Biology Chapter 1 The Living World with Answers Pdf free download. MCQ Questions for Class 11 Biology with Answers were prepared based on the latest exam pattern. We have provided The Living World Class 11 Biology MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-11-biology-chapter-1/

The Living World Class 11 MCQs Questions with Answers

The Living World Class 11 MCQ Question 1.
Identify the incorrect match.
(a) Physiology – Study of functions and processes of life
(b) Pedology – Soil science
(c) Limnology – Study of fresh water
(d) Kinesiology – Fossil study

Answer

Answer: (d) Kinesiology – Fossil study

MCQ Questions For Class 11 Biology Chapter 1 Question 2.
The Phylogenetic system of classification was put forth by
(a) Theophrastus
(b) George Bentham and Joseph Dalton Hooker
(c) Carolus Linnaeus
(d) Adolf Engler and Karl Prantl

Answer

Answer: (d) Adolf Engler and Karl Prantl

Class 11 Biology Chapter 1 MCQ Question 3.
Two taxonomic species are distinguished from each other by
(a) their failure to interbreed
(b) their ability to exchange gene freely
(c) their similarity in morphological characters
(d) discontinuity in a set of correlated characters

Answer

Answer: (a) their failure to interbreed
Explanation:
Two taxonomic species are distinguished from each other by their failure to interbreed.

Living World Class 11 MCQs Question 4.
Musca domestica is common name of
(a) Housefly
(b) Mosquito
(c) Snail
(d) Ant

Answer

Answer: (a) Housefly
Explanation:
Musca domestica is the common name of housefly.

Biology Class 11 Chapter 1 MCQs Question 5.
Keystone species are
(a) important for ecosystem
(b) important for plants
(c) endangered species
(d) extinct species

Answer

Answer: (a) important for ecosystem
Explanation:
Keystone species are plants or animals species that play a unique and crucial role in the way an ecosystem functions.
They are very important for ecosystem to function properly.

The Living World MCQ Class 11 Question 6.
The study of fish culture is called
(a) ophiology
(b) herpetology
(c) ichthyology
(d) pisciculture

Answer

Answer: (d) pisciculture

Living World Class 11 MCQ Question 7.
National Botanical Research Institute is located in
(a) Shimla
(b) Dehradun
(c) Howrah
(d) Lucknow

Answer

Answer: (d) Lucknow
Explanation:
National Botanical Research Institute is located in Lucknow.

Chapter 1 Biology Class 11 MCQs Question 8.
Biosystematics aims at
(a) Identification and arrangement of organisms on the basis of cytological characteristics
(b) The classification of organisms based on broad morphological characters
(c) Delimiting various taxa of organism and establishing their relationships
(d) The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

Answer

Answer: (d) The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies

Class 11 Bio Chapter 1 MCQ Question 9.
In angiosperm, characters of flowers are used in classification because
(a) Flowers are attractive
(b) Flowers are large
(c) Characters of flowers are conservative
(d) None of the above

Answer

Answer: (c) Characters of flowers are conservative

MCQ Class 11 Biology Chapter 1 Question 10.
Scientific name of plants are given by
(a) International code for Botanical nomenclature
(b) International code for biological plants
(c) Indian code for Botanical nomenclature
(d) International code for zoological nomenclature

Answer

Answer: (a) International code for Botanical nomenclature
Explanation:
The scientific names of plants are given by International code for Botanical nomenclature.

Ncert Biology Class 11 Chapter 1 MCQ Question 11.
A system which gets a continuous flow of energy is called
(a) micropropagated system
(b) closed system
(c) open system
(d) steady state

Answer

Answer: (c) open system

Ch 1 Bio Class 11 MCQ Question 12.
Solanum, Panthera, Homo are examples of
(a) Family
(b) Division
(c) Genera
(d) Species epithet

Answer

Answer: (c) Genera
Explanation:
Solanum, Panthera, Homo are examples of generic names.

MCQ On Living World Class 11 Question 13.
Which of the following is correct?
(a) Musca domestica Order – Diptera Family – Muscidae Phylum – Arthropoda
(b) Mangifera indica Order – Sapindales Family – Anacardiaceae Phylum – Gymnospermae
(c) Triticum aestivum Order – Poles Family – Monocotyledons Phylum – Angiospermae
(d) Panthera leo Order – leo Family – Felidae Phylum – Mammalia

Answer

Answer: (a) Musca domestica Order – Diptera Family – Muscidae Phylum – Arthropoda
Explanation:
Mangifera indica belongs to Phylum Angiospermae.
Triticum aestivum belongs to family Poaceae.
Panthera leo belongs to order Carnivora.

Class 11 Bio Ch 1 MCQ Question 14.
Binomial Nomenclature was given by
(a) Ernst Mayr
(b) Alexander Agassiz
(c) Carolus Linnaeus
(d) Alexander Agassiz and Carlous Linnaeus

Answer

Answer: (c) Carolus Linnaeus
Explanation:
The system of providing scientific names with two components i.e. generic name and specific epithet is called Binomial Nomenclature.
Binomial Nomenclature was given by Carolus Linnaeus.

MCQ Questions For Class 11 Biology Chapter 1 With Answers Question 15.
Systematics deals with
(a) Nomenclature of new organisms
(b) Evolutionary relationship between organisms
(c) Identification of newly discovered organisms
(d) All of these

Answer

Answer: (d) All of these
Explanation:
Linnaeus used Systema Naturae as the title of his publication.
The scope of systematics includes identification, nomenclature and classification.
Systematics takes into account evolutionary relationship between organisms.

MCQ Chapter 1 Biology Class 11 Question 16.
Which of the following shows maximum diversity?
(a) Plantas
(b) Animalia
(c) Monerans
(d) Protistans

Answer

Answer: (b) Animalia

MCQs Of Biology Class 11 Chapter 1 Question 17.
Which of the following does not come under taxon?
(a) Species
(b) Kingdom
(c) Division
(d) Key

Answer

Answer: (d) Key
Explanation:
Taxon is a group of one or more population of organisms.
Kingdom, division and species come under taxon but key is taxonomical aid.

MCQ Of Chapter 1 Biology Class 11 Question 18.
The ozone layer is found in the
(a) hydrosphere
(b) stratosphere
(c) lithosphere
(d) troposphere

Answer

Answer: (b) stratosphere

Class 11 Biology Chapter 1 MCQs Question 19.
Taxonomic studies depends on
(a) Ecological information of organisms.
(b) Structure of cell and development process of organisms.
(c) External and internal structure of organisms.
(d) All of the above.

Answer

Answer: (d) All of the above.
Explanation:
Taxonomic studies depends on ecological information of organisms, structure of cell and development process of organism and external and internal structure of organisms.

Biology MCQs For Class 11 Chapter 1 With Answers Pdf Question 20.
Wheat belongs to division ______.
(a) Angiospermae
(b) Gymnospermae
(c) Poacae
(d) None of the above

Answer

Answer: (a) Angiospermae
Explanation:
Wheat belongs to Angiospermae division.

We hope the given NCERT MCQ Questions for Class 11 Biology Chapter 1 The Living World with Answers Pdf free download will help you. If you have any queries regarding CBSE Class 11 Biology The Living World MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

MCQ Questions for Class 11 Biology with Answers Chapter Wise PDF Download

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Get Chapter Wise MCQ Questions for Class 11 Biology with Answers PDF Free Download prepared here according to the latest CBSE syllabus and NCERT curriculum https://ncert.nic.in/. Students can practice CBSE Class 11 Biology MCQs Multiple Choice Questions with Answers to score good marks in the examination.

Class 11 Biology MCQs Multiple Choice Questions with Answers

Practicing these CBSE NCERT Objective MCQ Questions of Class 11 Biology with Answers Pdf will guide students to do a quick revision for all the concepts present in each chapter and prepare for final exams.

  1. The Living World Class 11 MCQ Questions
  2. Biological Classification Class 11 MCQ Questions
  3. Plant Kingdom Class 11 MCQ Questions
  4. Animal Kingdom Class 11 MCQ Questions
  5. Morphology of Flowering Plants Class 11 MCQ Questions
  6. Anatomy of Flowering Plants Class 11 MCQ Questions
  7. Structural Organisation in Animals Class 11 MCQ Questions
  8. Cell: The Unit of Life Class 11 MCQ Questions
  9. Biomolecules Class 11 MCQ Questions
  10. Cell Cycle and Cell Division Class 11 MCQ Questions
  11. Transport in Plants Class 11 MCQ Questions
  12. Mineral Nutrition Class 11 MCQ Questions
  13. Photosynthesis in Higher Plants Class 11 MCQ Questions
  14. Respiration in Plants Class 11 MCQ Questions
  15. Plant Growth and Development Class 11 MCQ Questions
  16. Digestion and Absorption Class 11 MCQ Questions
  17. Breathing and Exchange of Gases Class 11 MCQ Questions
  18. Body Fluids and Circulation Class 11 MCQ Questions
  19. Excretory Products and their Elimination Class 11 MCQ Questions
  20. Locomotion and Movement Class 11 MCQ Questions
  21. Neural Control and Coordination Class 11 MCQ Questions
  22. Chemical Coordination and Integration Class 11 MCQ Questions

We hope the given NCERT MCQ Questions for Class 11 Biology with Answers PDF Free Download will help you. If you have any queries regarding CBSE Class 11 Biology MCQs Multiple Choice Questions with Answers, drop a comment below and we will get back to you soon.

MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers

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Check the below NCERT MCQ Questions for Class 11 Chemistry Chapter 14 Environmental Chemistry with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. We have provided Environmental Chemistry Class 11 Chemistry MCQs Questions with Answers to help students understand the concept very well. https://mcqquestions.guru/mcq-questions-for-class-11-chemistry-chapter-14/

Environmental Chemistry Class 11 MCQs Questions with Answers

Environmental Chemistry MCQ Chapter 14 Class 11 Question 1.
The agricultural field that produces maximum methane gas into atmosphere is
(a) Wheat field
(b) Paddy field
(c) Cotton field
(d) Groundnut field

Answer

Answer: (c) Cotton field
Explanation:
Rice is grown in flooded fields, a situation that depletes the soil of oxygen. Soils that are anaerobic (lacking oxygen) allow the bacteria that produce methane from decomposing organic matter to thrive. Some of this methane then bubbles to the surface, but most of it is diffused back into the atmosphere through the rice plants themselves. Hence, rice Paddy field that produces maximum methane gas into the atmosphere.

MCQ On Environmental Chemistry Chapter 14 Class 11 Question 2.
Fluorosis, the bone disease, is caused by the presence of
(a) Pesticides in water
(b) Fluorides in water
(c) Carbon monoxide in air
(d) Sulphur dioxide in air.

Answer

Answer: (b) Fluorides in water
Explanation:
Skeletal fluorosis is a bone disease caused by excessive accumulation of fluoride in the bones. In advanced cases, skeletal fluorosis causes painful damage to bones and joints.

Environmental Chemistry Class 11 MCQ Chapter 14 Question 3.
The most harmful air pollutant produced by automobiles is
(a) HNO3
(b) NO
(c) SO2
(d) CO.

Answer

Answer: (d) CO.
Explanation:
Motor vehicle emissions contribute to air pollution and are a major ingredient in the creation of smog in some large cities. Transportation contributes to more than half of the carbon monoxide, sulphur dioxide and nitrogen oxides, and almost a quarter of the hydrocarbons emitted into our air. Carbon monoxide (CO) is a colourless, odourless, toxic non-irritating gas. It is a product by incomplete combustion of fuel such as natural gas, coal or wood. Vehicular exhaust is a major source of carbon monoxide.

MCQ On Environmental Chemistry Class 11 Chapter 14 Question 4.
Which of the following is responsible for depletion of ozone layer in the upper strata of the atmosphere?
(a) Polyhalogens
(b) Ferrocene
(c) Fullerencs
(d) Freons.

Answer

Answer: (d) Freons.
Explanation:
Fluorocarbons such as freon-1 (CFCl3) and freon-12 (CF2Cl2) emitted as propellants in aerosol spray cans, refrigerators, fire fighting reagents etc. are stable compounds and chemically inert. They do not react with any substance with which they come in contact and thus float through the atmosphere unchanged and eventually enter the stratosphere. There they absorb UV radiations and break down liberating free atomic chlorine which causes decomposition of ozone. This results in the depletion of the ozone layer.

MCQs On Environmental Chemistry Chapter 14 Class 11 Question 5.
Photochemical smog is related to pollution if
(a) Air
(b) Water
(c) Soil
(d) None of these

Answer

Answer: (c) Soil
Explanation:
Photochemical smog is produced when pollutants from the combustion of fossil fuels react with sunlight. The energy in the sunlight converts the pollutants into other toxic chemicals. For photochemical smog to form, there must be other pollutants in the air, specifically nitrous oxides and other volatile organic compounds (VOCs).

Environmental Chemistry MCQ And Answers Pdf Class 11 Question 6.
Which of the following acts as a sink for CO?
(a) Plants
(b) Haemoglobin
(c) Microorganisms present in the soil
(d) Oceans

Answer

Answer: (c) Microorganisms present in the soil
Explanation:
CO is converted into CO2 by microorganism present in soil.

Environmental Chemistry MCQs Chapter 14 Class 11 Question 7.
Domestic waste mostly constitutes
(a) Non-biodegradable pollution
(b) Biodegradable pollution
(c) Effluents
(d) Air pollution

Answer

Answer: (b) Biodegradable pollution
Explanation:
Domestic waste mostly constitutes biodegradable pollution.

Environmental Chemistry MCQ Questions Chapter 14 Class 11 Question 8.
Which is most harmful for life on globe?
(a) Deforestation
(b) Soil Erosion
(c) Increasing Desert
(d) Nuclear Fallout.

Answer

Answer: (d) Nuclear Fallout.
Explanation:
Nuclear fallout, or simply fallout, is the residual radioactive material propelled into the upper atmosphere following a nuclear blast or a nuclear reaction conducted in an unshielded facility, so called because it “falls out” of the sky after the explosion and the shock wave have passed. While deforestation, soil erosion and increasing deserts can be controlled, nuclear fallout causes genetic mutation in humans and destruction that cannot be controlled or cured.

Environmental Chemistry MCQ With Answers Chapter 14 Class 11 Question 9.
One of the following is the chief source of water and soil pollution
(a) Agro industry
(b) Mining
(c) Thermal power stations
(d) All of these

Answer

Answer: (c) Thermal power stations
Explanation:
Thermal power plant, agro industry and mining all are responsible for soil and water pollution. (Due to extraction of chemicals which cause pollution)

MCQ Environmental Chemistry Pdf Chapter 14 Class 11 Question 10.
What is the indicator of pollution in water?
(a) Amount of oxygen
(b) Amount of hydrogen
(c) Amount of BOD
(d) Amount of nitrogen

Answer

Answer: (c) Amount of BOD
Explanation:
The amount of oxygen required to break down a certain amount of organic matter is called the biological oxygen demand (BOD). The amount of BOD in water is an indicator of the level of pollution.

Class 11 Chemistry MCQ With Answers Chapter 14  Question 11.
Which of the following acts as a sink for CO?
(a) Plants
(b) Haemoglobin
(c) Microorganisms present in the soil
(d) Oceans

Answer

Answer: (c) Microorganisms present in the soil
Explanation:
CO is converted into CO2 by microorganism present in soil.

Chemistry Class 11 MCQ Chapter 14 Question 12.
The false statement among the followings:
(a) The average residence time of NO is one month.
(b) Limestone acts as a sink for SOx.
(c) SOx can be removed from flue gases by passing through a solution of citrate ions.
(d) Ammonia acts as a sink for NOx.

Answer

Answer: (d) Ammonia acts as a sink for NOx.
Explanation:
The average residence time of NO is 4 days.

Environmental Chemistry MCQs Pdf Chapter 14 Class 11 Question 13.
A disease caused by eating fish contaminated by industrial waste, containing mercury compounds, is called as
(a) Minamata disease
(b) Brights disease
(c) Hashimotos disease
(d) Osteosclerosis

Answer

Answer: (a) Minamata disease
Explanation:
Disease caused by eating fish found in water contaminated with industrial waste having mercury is minamata disease.

Class 11 Chemistry MCQ With Answers Pdf Chapter 14 Question 14.
Which of the following is responsible for depletion of ozone layer in the upper strata of the atmosphere?
(a) Polyhalogens
(b) Ferrocene
(c) Fullerencs
(d) Freons.

Answer

Answer: (d) Freons.
Explanation:
Fluorocarbons such as freon-1 (CFCl3) and freon-12 (CF2Cl2) emitted as propellants in aerosol spray cans, refrigerators, fire fighting reagents etc. are stable compounds and chemically inert. They do not react with any substance with which they come in contact and thus float through the atmosphere unchanged and eventually enter the stratosphere. There they absorb UV radiations and break down liberating free atomic chlorine which causes decomposition of ozone. This results in the depletion of the ozone layer.

Environmental Chemistry Questions Chapter 14 Class 11 Question 15.
Photochemical smog is related to pollution if
(a) Air
(b) Water
(c) Soil
(d) None of these

Answer

Answer: (c) Soil
Explanation:
Photochemical smog is produced when pollutants from the combustion of fossil fuels react with sunlight. The energy in the sunlight converts the pollutants into other toxic chemicals. For photochemical smog to form, there must be other pollutants in the air, specifically nitrous oxides and other volatile organic compounds (VOCs).

Question 16.
Identify the wrong statement in the following:
(a) Acid rain is mostly because of oxides of nitrogen and sulphur
(b) Chlorofluorocarbons are responsible for ozone layer depltion
(c) Greenhouse effect is responsible for global warming
(d) Ozone layer does not permit infrared radiation from the sun to reach the earth.

Answer

Answer: (d) Ozone layer does not permit infrared radiation from the sun to reach the earth.
Explanation:
Allotropes of Oxygen-
O2 (Dioxygen) and O3 (Ozone)
Infrared radiation is most important for heating up the atmosphere and the surface of the earth. These rays have high wavelength and low frequency and are not very harmful. Ozone does not hinder infrared radiation.

Question 17.
Synthesis of ethanal commercially from which of the following reagent is the part of green chemistry?
(a) CH3CH2OH
(b) CH2 = CH2
(c) HC ≡ CH
(d) All of these

Answer

Answer: (b) CH2 = CH2

Question 18.
Which of the following is produced by a reaction of ultraviolet light?
(a) CO2
(b) SO2
(c) O3
(d) NO3

Answer

Answer: (c) O3
Explanation:
Ultraviolet radiations cause photochemical splitting of oxygen molecules in the stratosphere. The nascent oxygen combines with molecular oxygen to form ozone. In troposphere nascent oxygen comes from nitrogen dioxide.

Question 19.
Why certain parts of water bodies contain more number of algae?
(a) Due to favorable environment
(b) Due to run-off excess fertilizers
(c) Due to lack of fertilizers
(d) Due to water pollution

Answer

Answer: (b) Due to run-off excess fertilizers
Explanation:
Inorganic plant nutrients found in fertilizers. Run-off carries excess fertilizers into nearby water bodies, causing high levels of plant nutrients which promote the excessive growth of algae and other aquatic plants.

Question 20.
The substance which is a primary pollutant?
(a) H2SO4
(b) CO
(c) PAN
(d) Aldehydes

Answer

Answer: (b) CO
Explanation:
Important Air pollutants
Oxides of carbon (CO,CO2)
Oxides of sulphur (SO2 & SO3)
Oxides of nitrogen
Chlorofluoro carbons (CFC)
Hydrocarbons Like CH4
​Photochemical and Industrial smog.
Dust & other particulate matter from industries.

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