Why does pure acetic acid not conduct electricity?

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

(a). Why do acids not show acidic behaviour in the absence of water? (b). Why does an aqueous solution of an acid conduct electricity? (c). Why does distilled water not conduct electricity whereas rain water does?

(i)Why does acidic solution conduct electricity? (ii) Can basic solution conduct electricity?

Why does distilled water not conduct electricity, wheras rainwater does?

Why does distilled water not conduct electricity, whereas rain water does?