NCERT MCQ CLASS-11 CHAPTER-7 | CHEMISTRY NCERT MCQ | | CHEMISTRY PART 2 | | ENVIRONMENTAL CHEMISTRY | EDUGROWN

In This Post we are  providing Chapter-7 Environmental Chemistry NCERT MCQ for Class 11 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON ENVIRONMENTAL CHEMISTRY

Question 1.
Which of the following has greatest affinity for hemoglobin?
(a) CO
(b) NO
(c) O₂
(d) CO₂

Answer: (b) NO

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Question 2.
Which of the following is the coldest region?
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Thermosphere.

Answer: (b) Mesosphere

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Question 3.
The aromatic compounds present as particulates are
(a) Benzene
(b) Toluene
(c) Nitrobenzene
(d) Poly cyclic hydrocarbons.

Answer: (d) Poly cyclic hydrocarbons.

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Question 4.
Ozone layer is present in
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Exosphere

Answer: (b) Stratosphere

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Question 5.
Depletion of ozone layer causes
(a) Blood cancer
(b) Lung cancer
(c) Skin cancer
(d) Breast cancer.

Answer: (c) Skin cancer

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Question 6.
Photochemical smog is formed in
(a) Summer during morning time
(b) Summer during day time
(c) Winter during morning time
(d) Winter during day time.

Answer: (b) Summer during day time

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Question 7.
Which of the following is not involved in formation of photochemical smog?
(a) NO
(b) O₃
(c) C_xH_y
(d) SO₂

Answer: (d) SO₂

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Question 8.
The most abundant hydrocarbon pollutant is
(a) Methane
(b) Ethane
(c) Propane
(d) Butane

Answer: (a) Methane

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Question 9.
Which of the following is present in maximum amount in acid rain?
(a) HNO₃
(b) H₂SO₄
(c) HCl
(d) H₂CO₃

Answer: (b) H₂SO₄

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Question 10.
Which of the following is not considered a pollutant?
(a) NO₂
(b) CO₂
(c) O₃
(d) C_xH_y

Answer: (b) CO₂

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Question 11.
Which of the following is not a greenhouse gas?
(a) CO₂
(b) CH₄
(c) Chlorofluorocarbons
(d) O₂

Answer: (d) O₂

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Question 12.
The size of the particulates of H₂SO₄ fog lies in the range
(a) 5-100 nm
(b) 100-500 nm
(c) 500-1000 nm
(d) 1000-10000 nm

Answer: (c) 500-1000 nm

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Question 13.
Which of the following is true about photochemical smog?
(a) It is reducing in nature
(b) It is formed during winter
(c) It is a mixture of smoke and fog
(d) It causes irritation in eyes.

Answer: (d) It causes irritation in eyes.

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Question 14.
Which of the following statement is false?
(a) London smog is oxidizing in nature
(b) London smog contains H₂SO₄ droplets
(c) London smog is formed during winter
(d) London smog causes bronchitis.

Answer: (a) London smog is oxidizing in nature

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Question 15.
The region closest to earth’s surface is
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Thermosphere.

Answer: (c) Troposphere

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