Question

a particular solid is very hard and has a very high melting point. In solid state it is a non conductor & its melt is a conductor of electricity. classify the solid
a) metallic b) molecular c)network d) ionic

Answer 1

Condition:

A particular solid is very hard and has a very high melting point. In solid state it is a non conductor & its melt is a conductor of electricity. Classify the solid

a) metallic

b) molecular

c) network

d) ionic

Solution:

a) is wrong because metallic solids are conductors.

b) is wrong because molecular solids have a low melting point.

c) is wrong because network solids are nonconductors (usually).

d) is right because ionic solids have a very high melting point, are very hard and in solid state are nonconductors, but their melts are conductors.

Answer: d) ionic.