# JEE Main > Environmental Chemistry

Explore popular questions from Environmental Chemistry for JEE Main. This collection covers Environmental Chemistry previous year JEE Main questions hand picked by popular teachers.

Physics
Chemistry
Maths

Q 1.

Correct4

Incorrect-1

Which of the following is a primary pollutant?

A

PAN

{tex} \mathrm { CO } {/tex}

C

Aldehydes

D

{tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex}

##### Explanation

Q 2.

Correct4

Incorrect-1

Choose the biodegradable pollutant out of the following.

A

DDT

Cow dung

C

Alkyl benzene sulphonate

D

Mercury

##### Explanation

Q 3.

Correct4

Incorrect-1

Identify the incorrect statement from the following.

A

Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer

C

Depletion of ozone layer is because of its chemical reactions with chlorofluoroalkanes

D

Ozone absorbs the intense ultraviolet radiation of the sunlight

##### Explanation

Q 4.

Correct4

Incorrect-1

Phosphate pollution is caused by

Sewage and agricultural fertilizers

B

Agricultural fertilizers only

C

Phosphate rocks and sewage

D

Weathering of phosphate rocks only

Q 5.

Correct4

Incorrect-1

A

Water pollutant

B

Soil pollutant

Air pollutant

D

##### Explanation

Q 6.

Correct4

Incorrect-1

Which of the following chemical, harmful to ozone, it released by chlorofluorocarbon?

A

Sulphur dioxide

Chlorine

C

Fluorine

D

Nitrogen dioxide

##### Explanation

Q 7.

Correct4

Incorrect-1

Pick up the correct statement:

A

Classical smog is good for health but not photochemical smog

B

During formation of smog ozone level in atmosphere decreases

C

Classical smog has an oxidizing character while photochemical smog is reducing in character

Photochemical smog occurs in day time whereas the classical smog occurs in early morning

##### Explanation

Q 8.

Correct4

Incorrect-1

Which one of the following dissolves more rapidly in haemoglobin than oxygen?

A

Ozone

B

{tex} \mathrm { SO } _ { 2 } {/tex}

C

{tex} \mathrm { N } _ { 2 } \mathrm { O } {/tex}

{tex} \mathrm { CO } {/tex}

##### Explanation

Q 9.

Correct4

Incorrect-1

The type of pollution caused by spraying of DDT

Air, water, and soil

B

Air and water

C

Air

D

Air and soil

##### Explanation

Q 10.

Correct4

Incorrect-1

Water pollution is caused by

A

Aeroplanes

B

Fly ash

C

Auto exhaust

Pesticides

##### Explanation

Q 11.

Correct4

Incorrect-1

The greenhouse effect is caused by

A

{tex} \mathrm { CO } {/tex}

B

{tex} \mathrm { NO } _ { 2 } {/tex}

C

{tex} \mathrm { NO } {/tex}

{tex} \mathrm { CO } _ { 2 } {/tex}

##### Explanation

Q 12.

Correct4

Incorrect-1

The substance having the largest concentration in acid rain?

A

{tex} \mathrm { H } _ { 2 } \mathrm { CO } _ { 3 } {/tex}

B

{tex} \mathrm { HNO } _ { 3 } {/tex}

C

{tex} \mathrm { HCl } {/tex}

{tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex}

##### Explanation

Q 13.

Correct4

Incorrect-1

Which of the following is not a consequence of greenhouse effect?

A

Climatic conditions will be changed

B

Plants in warmer climates with adequate rainfall would grow faster

C

The incidence of infectious diseases is likely to increase

Malaria will be controlled as the mosquitoes will not survive

##### Explanation

Q 14.

Correct4

Incorrect-1

Presence of which fuel gas in exhaust fumes shows incomplete combustion of fuel?

A

Sulphur dioxide

B

Carbon monoxide and water vapour

Carbon monoxide

D

Nitrogen dioxide

##### Explanation

Q 15.

Correct4

Incorrect-1

Formation of ozone in the upper atmosphere from oxygen takes place by the action of

A

Nitrogen oxides

Ultraviolet rays

C

Cosmic rays

D

##### Explanation

Q 16.

Correct4

Incorrect-1

The chemical entities present in thermosphere of the atmosphere are

{tex} \mathrm { O } ^ { + 2 } , \mathrm { O } ^ { + } , \mathrm { NO } ^ { + } {/tex}

B

{tex} \mathrm { O } _ { 3 } {/tex}

C

{tex} \mathrm { N } _ { 2 } , \mathrm { O } _ { 2 } , \mathrm { CO } _ { 2 } , \mathrm { H } _ { 2 } \mathrm { O } {/tex}

D

{tex} \mathrm { O } 3 , \mathrm { O } _ { 2 } ^ { + } , \mathrm { O } _ { 2 } {/tex}

##### Explanation

Q 17.

Correct4

Incorrect-1

What is not correct about greenhouse effect?

A

It results in global warming.

B

{tex} \mathrm { CO } _ { 2 } {/tex} is one of the main chemical species responsible for it.

It results in lowering of levels of ocean over the years.

D

{tex} \mathrm { CH } _ { 4 } , \mathrm { O } _ { 3 } , \mathrm { CFC } {/tex} also contribute to greenhouse effect.

##### Explanation

Q 18.

Correct4

Incorrect-1

Which of the following belongs to secondary air pollutant?

A

{tex} \mathrm { CO } {/tex}

B

Hydrocarbon

Peroxyacetyl Nitrate

D

None of these

##### Explanation

Q 19.

Correct4

Incorrect-1

Which of the following is not considered to be a pollutant?

A

{tex} \mathrm { NO } _ { 2 } {/tex}

{tex} \mathrm { CO } _ { 2 } {/tex}

C

{tex} \mathrm { O } _ { 3 } {/tex}

D

{tex} \mathrm { SO } _ { 3 } {/tex}

##### Explanation

Q 20.

Correct4

Incorrect-1

Environmental pollution affects:

A

biotic components

B

human beings only

C

plants only

biotic and abiotic components of environment

##### Explanation

Q 21.

Correct4

Incorrect-1

Persistent pesticides such as DDT pass into food chain and increase in amount per unit weight of organism due to their accumulation in fat. This phenomenon is called

biomagnification

B

C

biosynthesis

D

decomposition

##### Explanation

Q 22.

Correct4

Incorrect-1

Negative soil pollutant is

A

converting fertile land into barren land by dumping ash, sludge, and garbage

B

reduction in soil productivity due to addition of pesticides and industrial wastes

reduction in soil productivity due to erosion and over use

D

None of the above

##### Explanation

Q 23.

Correct4

Incorrect-1

Which of the following is the coldest region of atmosphere?

A

Thermosphere

B

Troposphere

Mesosphere

D

Stratosphere

##### Explanation

Q 24.

Correct4

Incorrect-1

The biggest particulate matter is

A

{tex} \mathrm { HNO } _ { 3 } {/tex} droplets

Fly ash

C

{tex} \mathrm { H } _ { 2 } \mathrm { SO } _ { 4 } {/tex} droplets

D

Soot

##### Explanation

Q 25.

Correct4

Incorrect-1

Which causes death of fish in water bodies polluted by sewage?

Decreases in DO

B

Pathogens

C

Clogging of gills by silt

D

Foul smell