Question

Whar do you means by federal constitution. Under which circumstances it becomes unitary ?

Answer 1

A federal constitution means the type wherein there is a clear division og powers between the state and the union. State matters (state list) are to be entertained only by the state govt, while union matters (union list) will be entertained only by the union govt.

During Breakdown of constitutional emergency, which also means state emergency, wherein all the powers of state administration come under the hands of union administration.