An example of a covalent crystalline solid is:

Which of the following compounds is a good conductor of electricity in solution state?

Most crystals show good cleavage because their atoms, ions or molecules are

The element which is used as semiconductor is

Certain crystals produce electric signals on application of pressure. This phenomenon is called:

A solid with high electrical and thermal conductivity is

In NaCl crystal each Cl– ion is surrounded by

Frenkel and Schottky defects are:

The pure crystalline substance on being heated gradually first forms a turbid liquid at constant temperature and still at higher temperature turbidity completely disappears. The behaviour is a characteristic of substance forming