set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

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 : 2

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

a) Ca₂SiO₄

b) Ca₃SiO₅

c) Ca₃Al₂O₆

d) Ca₃(PO₄)₂

Question : 3

Which one of the following statements about ozone and ozone layer is true?

a) The conversion of ozone to oxygen is an endothermic reaction

b) Ozone layer is beneficial to us because ozone cuts out the ultraviolet radiation of the sun

c) Ozone has a triatomic linear molecule

d) None

Question : 4

Presence of which of the following fuel gas in the exhaust fumes shows incomplete combustion of fuel?

a) Carbon monoxide and water vapour

b) Carbon monoxide

c) Sulphur dioxide

d) Nitrogen dioxide

Question : 5

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 : 6

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