First slide

Water Pollution and its Control

Question

Which one of the following statement pertaining to pollutants is correct?

Easy

A

DDT is a non-biodegradable pollutant.
B

Excess fluoride in drinking water causes osteoporosis, hardening of bones, stiff joints.
C

Excess cadmium in drinking water causes black foot disease.
D

Methylmercury in water may cause "Itai Itai" disease.

Solution

Excess fluorine in drinking water causes hardening of bones and stiffness of joints.
Black foot disease is due to arsenic.
Itai - Itai disease is due to cadmium in contaminated water.

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