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Environmental Chemistry MCQs

Study the chemical principles affecting the environment with our expert-curated Environmental Chemistry MCQs. These multiple-choice questions cover essential topics such as water and air pollution, chemical pollutants, greenhouse gases, acid rain, ozone depletion, heavy metals, soil chemistry, environmental toxicology, chemical waste management, and green chemistry. This category is especially useful for candidates preparing for PPSC, FPSC, CSS, NTS, SPSC, BPSC, KPSC, ETEA, AJKPSC, and for lecturer chemistry posts, environmental officer exams, and science educator roles. Also ideal for BSc/MSc Chemistry students with a focus on environmental studies.

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1 Environmental Chemistry MCQs

Which of the following phenomena is considered responsible for global warming?

  • Greenhouse effect
  • Fire in coal mines
  • Dry farming
  • Monsoon
0 Comments
Correct Answer: A. Greenhouse effect

Explanation:

Global warming refers to the gradual increase in the average temperature of the ... Read More Details

2 Environmental Chemistry MCQs

Which poisonous gas is present in the exhaust fumes of a jet plane?

  • Fluorocarbon
  • Carbon monoxide
  • Methane
  • C₂H₂ (Acetylene)
0 Comments
Correct Answer: B. Carbon monoxide

Explanation:

Jet engines burn aviation fuel to produce thrust, and in this process several ... Read More Details

3 Environmental Chemistry MCQs

Which anions of soap react with Ca²⁺ and Mg²⁺ ions in hard water to form curd (scum)?

  • Sodium hexadecanoate
  • Sodium octadecanoate
  • Sodium pentadecanoate
  • Both A & B
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Correct Answer: D. Both A & B

Explanation:

Soaps are sodium or potassium salts of long-chain fatty acids. When soap is ... Read More Details

4 Environmental Chemistry MCQs

Which compound is responsible for destroying the ozone layer?

  • CFCs
  • CH₃COOH
  • Both A & B
  • None of these
0 Comments
Correct Answer: A. CFCs

Explanation:

The ozone layer is a protective layer in the Earth's stratosphere that absorbs ... Read More Details

5 Environmental Chemistry MCQs

What is the main cause of soil pollution?

  • Aerosol
  • Ozone
  • Acid rain
  • PAN
0 Comments
Correct Answer: C. Acid rain

Explanation:

Soil pollution occurs when the natural composition of soil is disturbed due to ... Read More Details

6 Environmental Chemistry MCQs

Which gas is used for the artificial ripening of green fruits?

  • Carbon dioxide
  • Acetylene
  • Ethane
  • Ethylene
0 Comments
Correct Answer: D. Ethylene

Explanation:

Artificial ripening of fruits is a common practice in agriculture and fruit marketing ... Read More Details

7 Environmental Chemistry MCQs

For the generation of biogas, the materials commonly used are ?

  • Animal wastes
  • Forest residues
  • Aquatic plants
  • None of the above
0 Comments
Correct Answer: A. Animal wastes

Explanation:

Biogas is a renewable source of energy produced by the anaerobic digestion of ... Read More Details

8 Environmental Chemistry MCQs

Air is a/an __________?

  • Compound
  • Element
  • Electrolyte
  • Mixture
0 Comments
Correct Answer: D. Mixture

Explanation:

Air is not a single substance but a physical mixture of different gases. ... Read More Details

9 Environmental Chemistry MCQs

Which one of the following serves as an aquatic solar fuel cell?

  • Bacteria
  • Virus
  • Fungi
  • Algae
0 Comments
Correct Answer: D. Algae

Explanation:

Algae are often described as aquatic solar fuel cells because of their ability ... Read More Details

10 Environmental Chemistry MCQs

How much of the solar energy absorbed by the Earth’s surface is used to drive the hydrologic (water) cycle?

  • 1/2
  • 1/3
  • 1/4
  • 1/5
0 Comments
Correct Answer: B. 1/3

Explanation:

The Earth continuously receives energy from the Sun, and this solar energy drives ... Read More Details

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