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Question

Write down the various exceptions in physical properties of non metals.


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Solution

Exceptional Physical properties of non-metals:

(i) Non-metals are generally bad conductor of heat and electricity.

Exception: Graphite being a non- metal is a good conductor of electricity. Non-metals do not conduct the electric current due to absence of free or mobile electrons.

(ii) Non-metals are soft.

Exception: Diamond is hard in nature.

(iii) Non-metals have low melting and boiling points.

Exception: Graphite has very high melting point (3730°C).


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