Piezoelectric crystals are used in

Why are amorphous solids called pseudo solids or supercooled liquids?

Which type of impurity is added to form a $p$-type semiconductor?

$A$ pure crystalline substance,on being heated gradually,first forms a turbid-looking liquid and then the turbidity completely disappears. This behaviour is the characteristic of substances forming

State the uses of amorphous solids and describe the cleavage property of amorphous solids.

The reason why solid $NaCl$ is a poor conductor of electricity is .......