Explain salt solution conducts electricity, but sugar solution does not.

A solution of commmon salt in water can conduct electricity but that of sugar in water can not. Explain why.

Why pure water does not conduct electricity? In what condition does it conduct electricity?

Why does molten PCl_(5) conduct electricity?

Which of the following compounds does not conduct electricity in solution?

Neither pure H_2SO_4 nor pure HClO_4 conducts electricity but a mixture of two doses does. Explain.

Ionic solids in water does not conduct electricity.

Conductivity of an electrolytic solution depends on -

You are supplied with two solutions, one of which is a soap solution and another is a sugar solution. How do you identify them as true solution or colloid?

With the help of band theory explain (i) inability of an insulator to conduct electricity and (ii) the electrical conductivity of a semiconductor.