Question

how is federal form of government from unitary form

Answer 1

none of these are known to me

Answer 2

The government are of two types-:
(I) Unitary Government
(ii) Federal Government

Unitary Government-: All the powers are in the hand of one central government
There is no division of subjects
The constitution may be unwritten

Federal Government-: In thus type of government there us dual administration and there is twin set if government namely Central and State Government- and the powers are distributed between these two
The constitution is written
The subjects are divided