(a) Why are people living in West Bengal prone to black foot disease?
(b) What is blue-baby syndrome ? Explain.

What is black foot disease ?

Why do people prefer to live in certain regions and not in others? Explain with example.

In the given region in Japan, fish eating people developed Itai-Itai disease. What was the cause of disease and the phenomenon involved ? Explain

(a) Why are Zn^(2+) salts white while Cu^(2+) salts are blue ? (b) What is meant by 'disproportionation' ? Write the disproportionation reaction of Cu^+ in aqueous solution.

(a) Explain why antibiotics are more effective in curing bacterial disease than viral diseases? (b) List two means of spreading of infectious disease.

Determine what type of pollution is responsible for the following diseases— Minamata, Black,foot disease, Asthma, Hepatitis.

Name the diseases caused by Hg and Cd contamination of water. What is black foot disease?