$A$ hard substance melts at high temperature and is an insulator in both solid and in molten state. This solid is most likely to be a / an :

  • A
    Ionic solid
  • B
    Molecular solid
  • C
    Metallic solid
  • D
    Covalent solid

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Silicon is

Assertion : Stability of a crystal is reflected in the magnitude of its melting point.
Reason : The stability of a crystal depends upon the strength of the interparticle attractive force.

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