set 3 MCQ Questions & Answers Detailed Explanation

Question : 1

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

a) Condensed gas

b) Super cooled liquid

c) Crystalline solid

d) Liquid crystal

Question : 2

The non-viable particulate is among the following is

a) Bacteria

b) Moulds

c) Dust

d) Fungi

Question : 3

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 : 4

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

a) COD

b) BOD

c) DO

d) All of these

Question : 5

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.