Identify the type of cyrstalline solid b...

Identify the type of cyrstalline solid based on the following properties :
(a) Conducts electricity in the molten state but in the solid state.
(b) Very hard with melting point and acts as electrical insulator.
(c) Conducts electricity in the solid state, malleable and ductile.

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(a) Ionic solid (b) Covalent or net work solid (c) Metallic solids.

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