Pollution (Air, Water, Soil) — Homi Bhabha Exam Biology MCQs with Solutions
Free Homi Bhabha Exam Biology Pollution (Air, Water, Soil) MCQs with step-by-step solutions (6 questions). Part of Ecosystem & Environmental Management. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Pollution (Air, Water, Soil) · medium · theory
A major cause of air pollution in cities is the:
A. rainfall
B. burning of fossil fuels by vehicles and industries ✓ Correct
C. planting of trees
D. use of solar energy
Solution: Vehicles and industries release smoke and harmful gases, polluting the air.
Q2 — Pollution (Air, Water, Soil) · hard · theory
Acid rain is caused mainly by the release of ______ into the atmosphere:
A. sulphur dioxide and nitrogen oxides ✓ Correct
B. oxygen and nitrogen
C. water vapour
D. carbon dioxide only
Solution: SO₂ and NOₓ from burning fuels dissolve in rain to form acids, causing acid rain.
Q3 — Pollution (Air, Water, Soil) · medium · theory
Which of the following is a common water pollutant?
A. Untreated sewage and industrial waste ✓ Correct
B. Sunlight
C. Oxygen
D. Rain water
Solution: Sewage, industrial effluents and chemicals pollute water bodies.
Q4 — Pollution (Air, Water, Soil) · hard · theory
The excessive use of chemical pesticides and plastics mainly causes:
A. oxygen pollution
B. noise pollution
C. soil pollution ✓ Correct
D. sound pollution
Solution: Pesticides and non-degradable plastics accumulate in the soil, causing soil pollution.
Q5 — Pollution (Air, Water, Soil) · medium · theory
A poisonous gas released by the incomplete burning of fuels in vehicles is:
A. carbon monoxide ✓ Correct
B. oxygen
C. nitrogen
D. water vapour
Solution: Carbon monoxide (CO), formed in incomplete combustion, is a toxic air pollutant.
Q6 — Pollution (Air, Water, Soil) · hard · theory
Which practice would help REDUCE air pollution?
A. Using more diesel vehicles
B. Using public transport and clean energy ✓ Correct
C. Cutting down forests
D. Burning more coal
Solution: Public transport and clean (renewable) energy reduce the emission of pollutants.