Like Borek: said, your question is practically impossible to solve, as written.
Will you please guide that how to do qualitative analysis of unknown mixture,
As was said, this is a thick book, at best. More likely a dozen.
The mixture may contain inorganic compounds as well as organic compounds.
That complicates the problem incredibly, and you just toss it in casually. That makes this question disappointing.
Count of compounds present in the mixture is also unknown.
This is not how qualitative analysis is done. Its a waste of resources and time to straddle the analytical chemist with a problem that is written like a guessing game. It simply isn't done.
Which steps should i take to do qualitative analysis of mixture.
Even before learning years of techniques, a better question has to be written.