set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

A sample contains two substances and has uniform properties. The sample is

a) an element

b) a heterogeneous mixture

c) a compound

d) a homogeneous mixture

Question : 2

The process used to separate oil and water is

a) separating funnel

b) distillation

c) sublimation

d) chromatography

Question : 3

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 : 4

The oxide of which of the following elements is used as a coolant?

a) Carbon

b) Silicon

c) Nitrogen

d) Phosphorus

Question : 5

Select the one that is a chemical change.

a) Cooking of food

b) Freezing of water

c) Melting of wax

d) None of these

Question : 6

Which one of the following is correct? Butter is

a) a molecular solid

b) a supercooled oil

c) an emulsion

d) None of these