Which writ in Latin means do we command?

In case of a disagreement between the two Houses of Parliament over a non-money bill

Which Writ is issued by a High Court or the Supreme Court to compel an authority to perform a function that it was not performing? 

Who appoint the Chief justice of Supreme court?

What was the exact constitutional position of the Indian Republic when the Constitution was brought into force with effect from 26th January, 1950? 

A federal structure for India was first put forward by the: