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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

Boron in soil is considered a micronutrient essential for _____________?

  • Soil porosity
  • Proper growth of plants
  • Alkalinity of soil
  • All of the above
0 Comments
Correct Answer: B. Proper growth of plants

Explanation:

Boron is an essential micronutrient required in very small amounts by plants for ... Read More Details

2 Environmental Chemistry MCQs

Permanent hardness of water, caused by the sulphates of metals, can be removed by using ________?

  • Zeolites
  • Sulphonides
  • Lime
  • Nitrates
0 Comments
Correct Answer: A. Zeolites

Explanation:

Water hardness is caused by the presence of dissolved salts of calcium and ... Read More Details

3 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

4 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

5 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
0 Comments
Correct Answer: D. Both A & B

Explanation:

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

6 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

7 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

8 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

9 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

10 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

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