set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

Among the following statements,

1. Minamata disease is caused by mercury.
2. Carbon monoxide is carcinogenic, so it is harmful to human beings.
3. Sewage waste is non-biodegradable pollutant.

a) 2 and 3

b) 1 and 2

c) 1 and 3

d) 1, 2 and 3

Question : 2

Which among the following statements is false?

a) The main reason for river water pollution is industrial and domestic sewage discharge

b) Oil slick in sea water increases D.O. value

c) Surface water contains a lot of organic matter mineral nutrients and radioactive materials

d) Oil spill in sea water causes heavy damage to fishery

Question : 3

Salts of which of the following elements provide colours to fireworks?

a) Strontium and barium

b) Potassium and mercury

c) Zinc and sulphur

d) Chromium and nickel

Question : 4

The type of pollution caused by spraying of DDT

a) Air and water

b) Air

c) Air and soil

d) Air, water and soil

Question : 5

The non-viable particulate is among the following is

a) Bacteria

b) Moulds

c) Dust

d) Fungi

Question : 6

Which one of the following correctly defines the state of glass?

a) Condensed gas

b) Super cooled liquid

c) Crystalline solid

d) Liquid crystal