Chemistry MCQs

Question 1

Sodium is produced by the electrolysis of

Accepted Answer

Molten sodium chloride

Answer

Molten sodium carbonate

Answer

Aqueous brine solution

Answer

Its cyanide complex

Question 2

Bleaching powder is prepared by passing :

Accepted Answer

Chlorine over slaked lime

Answer

Oxygen over slaked lime

Answer

Carbon dioxide over slaked lime

Answer

Chlorine over quick lirne

Question 3

Most commonly used bleaching agent is

Accepted Answer

Chlorine

Answer

Sodium chloride

Answer

Alcohol

Answer

Carbon dioxide

Question 4

The acid which is secreted by the glands in the stomach wall is

Accepted Answer

Hydrochloric acid

Answer

Sulphuric acid

Answer

Nitric acid

Answer

Phosphoric acid

Question 5

Hydrochloric acid is also known as

Accepted Answer

Muriatic acid

Answer

Galic acid

Answer

Picric acid

Answer

Chloric acid

Question 6

Heating of a ore below its melting point in the absence of air is known as

Accepted Answer

Calcination

Answer

Refining

Answer

Roasting

Answer

Smelting

Question 7

Stainless steel is usually made by alloying the steel with

Accepted Answer

Chromium and nickel

Answer

Copper and nickel

Answer

Copper and chromium

Answer

Manganese and copper

Question 8

An alloy used in making heating elements for electric heating device is

Accepted Answer

Nichrome

Answer

Solder

Answer

Alloy Steel

Answer

German Silver

Question 9

Which of the following is an iron ore ?

Accepted Answer

Magnetite

Answer

Bauxite

Answer

Lignite

Answer

Nitrite