Which of the following is NOT the reason for water pollution in our country?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Combustion of coal
Water becomes polluted when harmful substances are added to it in such amounts that it becomes unfit for use.
Option (1) Decomposition of plants and animals — A reason for water pollution. It is a natural source.
Option (2) Industrial wastes — A reason for water pollution. Factories throw harmful waste and chemicals into rivers and lakes. Among human activities, industry pollutes water the most.
Option (3) Domestic wastes — A reason for water pollution. Sewage from homes is a source of water pollution.
Option (4) Combustion of coal — Not a reason for water pollution. Burning coal pollutes the air, not water.
Note: A similar question was also asked in CUET (UG) 2026 on 24-05-2026 (Slot 2).
NCERT (2026-27): “Water Pollution … Though water pollutants are also created from natural sources (erosion, landslides, decay and decomposition of plants and animals, etc.) pollutants from human activities are the real causes of concern. Human beings pollute the water through industrial, agricultural and cultural activities. Among these activities, industry is the most significant contributor.”
Table 9.1 : Types and Sources of Pollution |
