Consider the following statements:

1.Industries generating hazardous waste are classified as red

2.Intake of lead (tetraethyl, an anti-knocking agent) may primarily damage the brain

3.The chemical behind blue baby syndrome is linked to nitrates

AOnly statements 1 and 2 are true

BOnly statements 2 and 3 are true

COnly statements 1 and 3 are true

DStatements 1, 2 and 3 are true ✓ Correct

Correct answer: (D) Statements 1, 2 and 3 are true

Explanation

Statement 1 is correct, as industries producing hazardous waste fall in the red category of pollution classification.

Statement 2 is correct, since lead from the tetraethyl anti-knock additive chiefly harms the brain and nervous system.

Statement 3 is correct, as blue baby syndrome is linked to nitrates in drinking water.

Nitrate alters haemoglobin so it cannot carry oxygen, giving affected infants a bluish tinge.

All three statements therefore hold true.

Leaded petrol has been phased out globally to curb lead poisoning.

Want more like this? Create a free account to practise a full test, track your progress, and get spaced-repetition review.