Question Hour:

It is the first hour of every parliamentary sitting (Timing 11:00 to 12:00 hours)

Three type of questions are asked:-

Starred Question: Requires an oral answer, hence supplementary questions can follow.

Unstarred Question: Requires written answer, supplementary questions can not follow.

Short Notice Question: One that is asked by giving a notice of less than 10 days, it is answered orally.

Zero Hour

The time immediately following the Question Hour & before any listed business is taken up in the House

The term 'Zero Hour' is formally not recognized in our Parliamentary procedure