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Question

Which of the following non-metal shows an exceptional physical property?


A

Graphite

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B

Nitrogen

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C

Sulphur

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D

Chlorine

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Solution

The correct option is D

Graphite


Physical Properties of non-metals

(i) Non-metals are generally bad conductor of heat and electricity.Non-metals do not conduct the electric current due to absent of free or mobile electrons.

Exception : Graphite is a good conductor of electricity.

(ii) Non-metals are generally soft. (Exception : Diamond is the hardest natural substance.)

(iii) Non-metals have low melting and boiling points. (Exception : Graphite has very high melting point (i.e. 3730 C).)

(iv) Non-metals have low density. (Exception: Diamond has high density.)


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