Chemistry MCQS for Class 10 Chapter 8

Sodium carbonate is manufactured by.

Solvay’s process

Ostwald’s process

Haber’s process

All

Petroleum fraction having composition C₇ to C₁₀ IS called

Petroleum gas

Petroleum Ether

Kerosine oil

Gasoline or petrol

How many % age of nitrogen present in air by volume?

75%

80%

70%

78%

Which one of the not metal.

Copper

Carbon

Iron

chromium

Concentration is a separating technique in which mineral is separated from.

Aluminates

All

Gangue

Silicates

Process of heating the concentrated ore to high temperature in excess of air is called.

All

Bessemerization

Smelting

Roasting

In forth flotation process the ore particles are preferentially wetted by:

water

oil

benzene

petrole

Matte is a mixture of:

CuS and FeO

Cu₂O and FeO

FeS and CuS

Cu₂S and FeS

Which one of the following is manufactured by Solvar’s process:

caustic soda

sulphuric acid

washing soda

urea

Formula of soda ash is.

NaHCO₃

Na₂SO₄

Na₂CO₃

Na₃PO₄