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

It is used in the manufacture of sulphuric acid

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.

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