Chemistry MCQs

Question 1

The element absorbed both in cation and anion form is

Accepted Answer

Nitrogen

Answer

Sulphur

Answer

Calcium

Answer

Phosphorus

Question 2

Cement containing excess amount of lime

Accepted Answer

Becomes more strong

Answer

Cracks during setting

Answer

Is slow setting

Answer

Is quick setting

Question 3

Commercially, sodium bicarbonate is known as

Accepted Answer

Baking soda

Answer

Washing soda

Answer

Bleaching powder

Answer

Soda ash

Question 4

Sodium vapour lamps glow with yellow colour. This is due to

Accepted Answer

The emission of excess energy absorbed by sodium atoms, in the yellow region of the spectrum

Answer

sublimation of sodium to emit yellow colour

Answer

The low ionisation energy of sodium

Answer

Its ability to absorb all other colours except yellow

Question 5

Which amidst the following is not a gem stone ?

Accepted Answer

Cat's-eye

Answer

Topaz

Answer

Opal

Answer

Pearl

Question 6

Calcium salts used as fertilizer is :

Accepted Answer

Calcium Sulphate

Answer

Calcium Carbide

Answer

Calcium Carbonate

Answer

Calcium Cyanide

Question 7

Aluminium salt commonly used to stop bleeding is

Accepted Answer

Aluminium sulphate

Answer

Aluminium nitrate

Answer

Aluminium Chloride

Answer

Potash alum

Question 8

In silvery paints, the main constituent present is

Accepted Answer

Aluminium powder

Answer

Silver powder

Answer

Lead powder

Answer

White lead

Question 9

The common name of sodium bicarbonate is

Accepted Answer

Baking soda

Answer

Soda ash

Answer

Soda lime

Answer

Baking powder