Ncert Exercises & Solutions

Match the pollutant (s) in Column I with effect (s) in Column II.

Column I	Column II
A. Oxides of Sulphur	1. Red haze in traffic and congested areas
B. Nitrogen dioxide	2. Damage to kidney
C. Lead	3. ‘Blue baby’ syndrome
D. Nitrate in drinking water	4. Respiratory diseases

Codes

HINT: Nitrate in drinking water causes 'Blue baby’ syndrome.

Explanation:

A. Low concentration of sulfur dioxide causes respiratory disease e.g., asthma, bronchitis, etc.

B. The irritant red haze in the traffic and congested place is due to oxides of nitrogen.

C. Excess nitrate in drinking water cause methemoglobinemia (blue baby syndrome).

D. Lead can damage the kidney, liver, reproductive system, etc.