does conduction of electricity in liquids occurs through electrons?give reasons.

In liquids, the electrical conductivity does not happen by transfer of electrons. No charge is transported by the motion of free electrons.  In fact the travelling ions which carry the electrical charge are responsible for current flow.  The positive ions move in the direction of the current and the negative ions move in the opposite direction of current.
However, electrical conductivity is different in different liquids. While salt water is an efficient conductor, the distilled water is an insulator.