100+ Metals, Nonmetals, Metalloids Multiple Choice Questions - 1

Question: 1

What is an alloy?

An alloy is a mixture of two or more metals fused together in the molten state in a fixed proportion.

Question: 2

What is meant by vulcanisation?

Heating natural rubber with sulphur to a definite temperature for a known period of time is known as vulcanisation of rubber. This process converts rubber into hard and elastic for an extensive use.

Question: 3

Mention the industrial uses of sulphur?

It is used in explosive industry

It is used in paper industry

It is used in photographic industry

Question: 4

What is liquation?

It is the process of refining easily fusible metals having low melting point like tin. Impure metal is placed on the inclined bed of a furnace and heated. When the metals melts, it flows down leaving the non fusible impurities behind.

Question: 5

What is the composition of Duralumin?

Duralumin consists of aluminium, copper and traces of magnetism and manganese.