The solid state

A solid substance 'A' is very hard and electrical insulator both in the solid state as well as in molten state. It has also very high melting point. Is the solid metal like silver or network solid like silicon carbide (SiC) ?

In ionic solids, the oppositely charged ions are closely packed in space and have strong electrostatic forces of attraction. These compound have high melting and boiling points and are poor conductors of electricity in the solid state. (i) Why are ionic solids poor conductros of electricity ? (ii) What happens to electrical conductivity when these are dissolved in water ?

In which of the following molecules, the number of possible angleXAX angles is maximum in the anionic part of their solid state ? [A : Central atom , X : Surrounding atom ]

In solid state, PCl_(5) is a……..

In solid state, PCl_(5) is a……..

In solid state, PCI_5 , is a

Give reason for, 'NaHCO_(3) is known in solid state but Ca(HCO_(3))_(2) is not isolated in solid state.

PCl_5 in solid state exists as.

PCl_5 in solid state exists as.

The compound is covalent in gaseous state but ionic in solid state is.