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28/09/2020 12:20 pm
Topic starter
Which one of the following statements pertaining to pollutants is correct?
(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
1 Answer
1
28/09/2020 12:21 pm
(a) DDT is a non-biodegradable pollutant
Explanation:
Excess fluorine in drinking water causes hardening of bones and stiffness of joints, black foot disease is due to arsenic and itai-itai disease is due to cadmium in contaminated water.