set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The major component used in preparation of different types of glasses is

a) Calcium silicate

b) Sodium borate

c) Silica

d) Sodium silicate

Question : 2

Which of the following practices will not come under green chemistry?

a) Using H₂O₂ for bleaching purpose instead of using chlorine based bleaching agents.

b) Using bicycle for travelling small distances instead of using petrol/ diesel based vehicles.

c) If possible, making use of soap made of vegetable oils instead of using synthetic detergents.

d) Using plastic cans for neatly storing substances.

Question : 3

Which of the following is a measure of organic pollution of water –

a) COD

b) BOD

c) DO

d) All of these

Question : 4

Identify the incorrect statement from the following.

a) Depletion of ozone layer is because of its chemical reactions with chlorofluoro alkanes.

b) Ozone absorbs infrared radiation.

c) Ozone absorbs the intense ultraviolet radiation of the sun.

d) Oxides of nitrogen in the atmosphere can cause the depletion of ozone layer.

Question : 5

Minamata disease is due to pollution of

a) organic waste into drinking water

b) oil spill in water

c) aresenic into the atmosphere

d) industrial waste mercury into fishing water

Question : 6

Which one of the following is used as an explosive?

a) Graphite

b) Mercuric oxide

c) Phosphorus trichloride

d) Nitroglycerine