Hi Aspirant,

There are several previous years paper available in the net which are solved as well as unsolved.You will get ample numbers of paper there.Some are in pdf format but most of them are in online format.You can also buy the book named Gov.pharmacist Previous Year Questions Papers 3000+ Authentic Questions  (Paper black, P.V.THORAT) from flipkart in order to avail all the papers.

Hope it helps!!