Chemistry MCQs

Question 1

Silver nitrate solution is kept in brown bottles in laboratory because

Accepted Answer

Brown bottles stops the passage of light through it

Answer

It reacts with ordinary white bottles

Answer

Brown bottles do not react with it

Answer

Brown bottles react with it

Question 2

Which colour is produce by Arsenic during flame test?

Accepted Answer

Blue

Answer

Green

Answer

Red

Answer

Crimson

Question 3

Bleaching action of moist sulphur dioxide is because of its

Accepted Answer

Oxidising property

Answer

Basic property

Answer

Acidic property

Answer

Reducing property

Question 4

Sulphur dioxide bleaches colouring matter by :

Accepted Answer

Reduction

Answer

Dehydration

Answer

Decomposition

Answer

Oxidation

Question 5

Which one of the following is commonly used for pulp bleaching in the paper industry?

Accepted Answer

Hydrogen peroxide

Answer

Mild sulphuric acid

Answer

Glucose isomerase

Answer

Iodine and water

Question 6

In upper layer of atmosphere ozone is formed by

Accepted Answer

The action of ultraviolet rays on oxygen

Answer

The combination of oxygen molecules

Answer

Subjecting oxygen to high pressure

Answer

The action of nitrogen on oxygen in atmosphere

Question 7

Which one of the following is used to restore the colour of old oil paintings ?

Accepted Answer

Hydrogen peroxide

Answer

Ozone

Answer

Barium peroxide

Answer

Sodium peroxide

Question 8

Ozone consists of

Accepted Answer

Oxygen only

Answer

Oxygen and Nitrogen

Answer

Hydrogen and Carbon

Answer

Oxygen and Carbon

Question 9

Ozone layer is present in

Accepted Answer

Stratosphere

Answer

Troposphere

Answer

Ionosphere

Answer

Exosphere