CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set B

Environmental Chemistry MCQ Questions with Answers Class 11 Chemistry

Question- Acid rain is due to

(a) CH₃

(b) N₂O₅

(c) SO₂ and NO₂

(d) C₂H₅OH

Answer-(c)

Question-The smog is essentially caused by the presence of

(a) Oxides of sulphur and nitrogen

(b) O₂ and N₂

(c) O₂ and O₃

(d) O₃ and N₂

Answer-(a)

Question- Which is related to ‘Green House Effect’?

(a) Farming of Green plants

(b) Farming of Vegetables in Houses

(c) Global Warming

(d) Biodegradable pollutant

Answer-(c)

Question-The pH of normal rain water is

(a) 6.5

(b) 7.5

(c) 5.6

(d) 3.5

Answer-(c)

Question-The gas emitted by supersonic jet planes that slowly depletes the concentration of ozone layer is

(a) CO

(b) NO

(c) SO₂

(d) O₂

Answer-(b)

Question- Which of the following green house gas is released in paddy field ?
I. CFCs     II. CH₄
III. SO₂

(a) Only I

(b) Only II

(c) Only III

(d) I and II

Answer-(b)

Question-Carbon monoxide (CO) is harmful to man because

(a) it forms carbolic acid

(b) it generates excess CO₂

(c) it is carcinogenic

(d) it competes with O₂ for haemoglobin

Answer-(d)

Question-The secondary precursors of photochemical smog are

(a) SO₂ and NO₂

(b) SO₂ and hydrocarbons

(c) NO₂ and hydrocarbons

(d) O₃ and PAN

Answer-(d)

Question- Which of the following statements is incorrect ?

(a) Smoke particulates consist of solid or mixture of solid and liquid particles formed during combustion of organic matter.

(b) Herbicides and insecticides that miss their target and travel through air form mists.

(c) Organic solvents, metals and metallic oxides form fume particles

(d) None of these

Answer-(d)

Question- The main element of smog is

(a) O₃ and PAN

(b) O₃

(c) PAN

(d) PPN and PBN

Answer-(a)

Question-Photochemical smog formed in congested metropolitan cities mainly consists of

(a) ozone, peroxyacetyl nitrate and NOx

(b) smoke, peroxyacetyl nitrate and SO₂

(c) hydrocarbons, SO₂ and CO₂

(d) hydrocarbons, ozone and SOx

Answer-(a)

Question-The quantity of CO2 in atmosphere is

(a) 3.34%

(d) 6.5%

(c) 0.034%

(d) 0.34%

Answer-(c)

Question-The substance which is not regarded as a pollutant?

(a) NO₂

(b) CO₂

(c) O₃

(d) Hydrocarbons

Answer-(b)

Question-Air pollution causing photochemical oxidants production include

(a) Carbon monoxide, sulphur dioxide

(b) Nitrous oxide, nitric acid fumes, nitric oxide

(c) Ozone, peroxyacetyl nitrate, aldehydes

(d) Oxygen, chlorine, fuming nitric acid

Answer-(c)

Question-Which of the following is/are the hazardous pollutant(s) present in automobile exhaust gases?
(i) N₂            (ii) CO
(iii) CH₄        (iv) Oxides of nitrogen

(a) (ii) and (iii)

(b) (i) and (ii)

(c) (ii) and (iv)

(d) (i) and (iii)

Answer-(c)

Question-Increase in global temperature increases the incidence of which of the following infectious disease(s)
(i) Sleeping sickness (ii) Yellow fever
(iii) Malaria (iv) Dengue

(a) (ii) only

(b) (i) and (ii)

(c) (iii) and (iv)

(d) (i), (ii), (iii) and (iv)

Answer-(d)

Question- Photochemical smog is due to the presence of

(a) oxides of sulphur

(b) oxides of nitrogen

(c) oxides of carbon

(d) lead

Answer-(b)

Question-The green house effect is caused by

(a) CO₂

(b) NO₂

(c) NO

(d) CO

Answer-(a)

Question-Classical smog occurs in places of

(a) excess SO₂

(b) low temperature

(c) high temperature

(d) excess NH₃

Answer-(b)

More Question

Instructions:

1. All questions are compulsory.

2. Please give the explanation for the answer where applicable.

Q1 - What do you understand by anoxia or asphyxiation ? 

Q2 - What is the effect of CFCs on ozone layer ? 

Q3 - Write any four methods for waste management .

Q4 - What do you understand by viable and non-viable particulates? 

Q5 - What is Green house Effect? 

Q6 - Differentiate between classical (London smog) and photochemical smog 

Q7 - What do you understand by global warming? What could be the consequences of global warming? 

Q8 - What do you understand by green chemistry? How can the environmental pollution be decreased by green chemistry? 

Q9 - Why is acid rain considered as threat to Taj-Mahal?

Please refer to the link below for CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set B