set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

It is said, the Tajmahal may be destroyed due to –

a) Air pollutants released from oil refinery of Mathura

b) Decomposition of marble as a result of high temperature

c) Flood in Yamuna river

d) All the above

Question : 2

The false statement among the followings :

a) Limestone acts as a sink for $SO_x$

b) $SO_x$ can be removed from flue gases by passing through a solution of citrate ions

c) The average residence time of NO is one month

d) Ammonia acts as a sink for $NO_x$

Question : 3

Which one of the following is not contained in Portland cement ?

a) Ca₂SiO₄

b) Ca₃SiO₅

c) Ca₃Al₂O₆

d) Ca₃(PO₄)₂

Question : 4

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 : 5

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 : 6

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