NEET > Environmental Chemistry

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


Q 1.    

Correct4

Incorrect-1

Which of the following is a sink for CO?

Microorganisms present in the soil

B

Oceans

C

Plants

D

None of the above

Explanation


Q 2.    

Correct4

Incorrect-1

Which one of the following is not a common component of Photochemical smog?

A

Ozone

B

Acrolein

C

Peroxyacetyl nitrate

Chlorofluorocarbons

Explanation

Q 3.    

Correct4

Incorrect-1

Which one of the following statements is not true?

A

Clean water would have a BOD value of 5 ppm.

B

Fluoride deficiency in drinking water is harmful. Soluble fluoride is often used to bring its concentration upto 1 ppm.

When the pH of rain water is higher than 6.5, it is called acid rain.

D

Dissolved Oxygen (DO) in cold water can reach a concentration upto 10 ppm.

Explanation


Q 4.    

Correct4

Incorrect-1

Which one of the following statements regarding photochemical smog is not correct?

A

Carbon monoxide does not play any role in photochemical smog formation.

B

Photochemical smog is an oxidising agent in character.

C

Photochemical smog is formed through photochemical reaction involving solar energy.

Photochemical smog does not cause irritation in eyes and throat.

Explanation

Q 5.    

Correct4

Incorrect-1

Which one of the following statement is not true?

A

pH of drinking water should be between 5.5 - 9.5

Concentration of DO below 6 ppm is good for the growth of fish.

C

Clean water would have a BOD value of less than 5 ppm.

D

Oxides of sulphur, nitrogen and carbon, are the most widespread air pollutant.

Explanation

Q 6.    

Correct4

Incorrect-1

Green chemistry means such reactions which

A

are related to the depletion of ozone layer

B

study the reactions in plants

C

produce colour during reactions

reduce the use and production of hazardous chemicals

Explanation

Q 7.    

Correct4

Incorrect-1

Which one of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?

A

Polyhalogens

B

Ferrocene

C

Fullerenes

Freons

Explanation

Q 8.    

Correct4

Incorrect-1

The substance which is a primary pollutant?

A

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

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

C

{tex} \mathrm { PAN } {/tex}

D

Aldehydes

Explanation

Q 9.    

Correct4

Incorrect-1

Ozone layer of stratosphere requires protection from indiscriminate use of

A

balloons

B

pesticides

C

atomic explosions

aerosols and high flying jets

Explanation

Q 10.    

Correct4

Incorrect-1

Which of the following acts as a sink for CO?

A

Plants

B

Haemoglobin

Microorganisms present in the soil

D

Oceans

Explanation

Q 11.    

Correct4

Incorrect-1

The viable particulate among the following is

A

fumes

algae

C

smoke

D

mist

Explanation

Q 12.    

Correct4

Incorrect-1

Which of the following statements is not true about classical smog?

Its main components are produced by the action of sunlight on emissions of automobiles and factories.

B

Produced in cold and humid climate.

C

It contains compounds of reducing nature.

D

It contains smoke fog and sulphur dioxide.

Explanation

Q 13.    

Correct4

Incorrect-1

Match the columns
{tex} \begin{array} { l l } { }{ \text { Column-I } } & { \text { Column-II} } \\ { \text { A. Nitrous oxide } } & { \text { I. Secondary pollutant } } \\ { \text { from car exhausts } } & { \text {II. Combustion of fossil } } \\ { \mathrm { B } \text { . Chlorofluorocarbon } } & { \text { fuels, wood, etc } } \\ { \text { C. Methane } } & { \text { III. Denitrification } } \\ { \text { D. Ozone } \left( \mathrm { O } _ { 3 } \right) } & { \text {IV.Refrigerators,aerosol sprays } } \\ { \mathrm { E.Carbondioxide } } & { \text {V.Cattle,Rice fields,toilets } } \end{array} {/tex}

{tex} \mathrm { A } - \mathrm { III } ; \mathrm { B } - \mathrm { IV } ; \mathrm { C } - \mathrm { V } ; \mathrm { D } - \mathrm { I } ; \mathrm { E } - \mathrm { II } {/tex}

B

{tex}\mathrm{ A - V ; B - I; C - I I I ; D - I V ; E - I I }{/tex}

C

{tex} \mathrm { A } - \mathrm { IV } ; \mathrm { B } - \mathrm { V } ; \mathrm { C } - \mathrm { I } ; \mathrm { D } - \mathrm { II } ; \mathrm { E } - \mathrm { III } {/tex}

D

{tex} \mathrm { A } - \mathrm { I } ; \mathrm { B } - \mathrm { III } ; \mathrm { C } - \mathrm { IV } ; \mathrm { D } - \mathrm { V } ; \mathrm { E } - \mathrm { II } {/tex}

Explanation

Q 14.    

Correct4

Incorrect-1

Which of the following sequence of {tex} \mathrm { T } {/tex} and {tex} \mathrm { F } {/tex} is correct for given statements. Here {tex} \mathrm { T } {/tex} stands for True statement and {tex} \mathrm { F } {/tex} stands for False statement.
(i) Troposphere is the lowest region of atmosphere in which the human beings along with other organisms live.
(ii) Troposphere extends up to the height of {tex} 10 \mathrm { km } {/tex} from sea level.
(iii)Stratosphere lies above troposphere,between {tex} 10\mathrm { km } {/tex} and {tex} 20 \mathrm { km } {/tex} above sea level.
(iv) Troposphere contains much little water vapour, dinitrogen, dioxygen and ozone
(v) Stratosphere contains ozone, and cloud formation also takes place in this region.

A

{tex} \mathrm { TTTT } {/tex}

B

{tex}\mathrm{TFTFF}{/tex}

{tex}\mathrm{TTFFF}{/tex}

D

{tex}\mathrm{TFTFT}{/tex}

Explanation

Q 15.    

Correct4

Incorrect-1

Green chemistry means such reactions which:

A

produce colour during reactions

produce colour during reactions

C

are related to the depletion of ozone layer

D

study the reactions in plants

Explanation

Q 16.    

Correct4

Incorrect-1

Photochemical smog consists of excessive amount of {tex}\mathrm{X}{/tex}, in addition to aldehydes, ketones, peroxyacetyl nitrate {tex}\mathrm{(PAN)}{/tex}, and so forth, {tex}\mathrm{X}{/tex} is:

A

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

B

{tex} \mathrm { CH } _ { 4 } {/tex}

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

D

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

Explanation

Q 17.    

Correct4

Incorrect-1

Which of the following statements about polar stratosphere clouds (PSCs) is not correct?

PSCs do not react with chlorine nitrate and HCl

B

Type I clouds are formed at about {tex} - 77 ^ { \circ } \mathrm { C } {/tex} and contain solid {tex} \mathrm { HNO } _ { 3 } .3 \mathrm { H } _ { 2 } \mathrm { O } {/tex}

C

Type II clouds are formed at about {tex} - 85 ^ { \circ } \mathrm { C } {/tex} and contain some ice

D

A tight whirlpool of wind called Polar Vortex is formed which surrounds Antarctica

Explanation

Q 18.    

Correct4

Incorrect-1

Match the Columns:
{tex} \begin{array} { l l } { \text { Column-I } } & { \text { Column-II } } \\ { \text { A. Oxides of sulphur } } & { \text { I. Global warming } } \\ { \text { B. Nitrogen dioxide } } & { \text {II. Damage to kidney } } \\ { \text { C. Carbon dioxide } } & { \text { III. 'Blue baby' syndrome } } \\ { \text { D. Nitrate in drinking } } & { \text { IV. Respiratory diseases } } \\ { \text { water } } \\ { \text { E Lead } } & { \text {V.Red haze congested areas congested areas } } \end{array} {/tex}

A

{tex}\mathrm{A-V;B-I;C-III;D-IV;E-II}{/tex}

{tex}\mathrm{A-IV;B-V;C-I;D-III;E-III}{/tex}

C

{tex}\mathrm { A - I V; B - I I ; C - I ;D - V ; E - I I I} {/tex}

D

{tex} \mathrm { A } - \mathrm { II } ; \mathrm { B } - \mathrm { IV }; \mathrm { C } - \mathrm { V } ; \mathrm { D } - \mathrm { III } ; \mathrm { E } - \mathrm { I } {/tex}

Explanation

Q 19.    

Correct4

Incorrect-1

Which of the following statements are not correct?
(i) {tex} \mathrm { F } ^ { - } {/tex} ion concentration above {tex} 2 \mathrm { ppm } {/tex} causes brown mottling in teeth.
(ii) Excessive {tex} \mathrm { F } ^ { - } {/tex} (over {tex} 10 \mathrm { ppm } {/tex} ) causes harmful effect to bones and teeth.
(iii) Excessive lead in drinking water causes disease methemoglobinemia
(iv) Deficiency of sulphate in drinking water causes laxative effect.

A

(ii) and (iv)

B

(ii) and (iii)

C

(ii), (iii) and (iv)

(iii) and (iv)

Explanation

Q 20.    

Correct4

Incorrect-1

The gas leaked from a storage tank of the Union Carbide plant in Bhopal gas tragedy was:

Methyl isocyanate

B

Methylamine

C

Ammonia

D

Phosgene

Explanation

Q 21.    

Correct4

Incorrect-1

Minamata disease is due to pollution of

A

aresenic into the atmosphere

B

organic waste into drinking water

C

oil spill in water

industrial waste mercury into fishing water

Explanation

Q 22.    

Correct4

Incorrect-1

Eutrophication causes reduction in

dissolved oxygen

B

nutrients

C

dissolved salts

D

All the above

Explanation

Q 23.    

Correct4

Incorrect-1

Which of the following is/are formed when ozone reacts with the unburnt hydrocarbons in polluted air?
{tex} \begin{array} { l l } { \text { (i) Formaldehyde } } & { \text { (ii) Acrolein } } \\ { \text { (iii) Peroxyacetyl nitrate}} & {\text{(iv) Formic acid } } \end{array} {/tex}

A

{tex}\mathrm{(i) and (iv)}{/tex}

B

{tex}\mathrm{(ii) only}{/tex}

C

{tex}\mathrm{(iii) only}{/tex}

{tex}\mathrm{(i), (ii) and (iii)}{/tex}

Explanation

Q 24.    

Correct4

Incorrect-1

Use of which of the following solvent in dry cleaning will result in less harm to ground water?

A

{tex} \mathrm { Cl } _ { 2 } \mathrm { C } = \mathrm { CCl } _ { 2 } {/tex}

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

C

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

D

None of these

Explanation

Q 25.    

Correct4

Incorrect-1

Which among the following statements is false?

Oil slick in sea water increases D.O. value

B

The main reason for river water pollution is industrial and domestic sewage discharge

C

Surface water contains a lot of organic matter mineral nutrients and radioactive materials

D

Oil spill in sea water causes heavy damage to fishery

Explanation