set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

A mixture of common salt, sulphur, sand and iron filings is shaken with carbon disulphide and filtered through a filter paper. The filtrate is evaporated to dryness in a china dish. What will be left in the dish after evaporation?

a) Iron filings

b) Sulphur

c) Sand

d) Common salt

Question : 2

The chemical name of lime stone is

a) Calcium carbonate

b) Calcium chloride

c) Calcium oxide

d) Calcium

Question : 3

Distillation is a good separation technique for

a) solid alloys

b) liquids

c) solids

d) gases

Question : 4

Which one of the following is not a mixture?

a) Baking soda

b) Tootpaste

c) Toilet soap

d) Vinegar

Question : 5

Magnetism is most beneficial for separating

a) non-metallic solids and solids such as sulfur

b) magnetic solids and solids such as sulfur

c) gases and non-metallic liquids

d) non-magnetic solids from non-magnetic liquids

Question : 6

The process used to separate oil and water is

a) separating funnel

b) distillation

c) sublimation

d) chromatography