Question

Ammonical silvernitrate form a white ppt easily with

Answer 1

This is known as Tollen's reagent and it reacts with Aldehydes.

Answer 2

Heya friend.....

here's your answer...

Tollens' reagent is an alkaline solution of ammoniacal silver nitrate and is used to test for aldehydes. Silver ions in the presence of hydroxide ions come out of solution as a brown precipitate of silver(I) oxide, Ag2O(s). This precipitate dissolves in aqueous ammonia, forming the diamminesilver(I) ion, [Ag(NH3)2]+. Ketones do not react with Tollens' reagent.

2Ag+ (aq) + 2OH- (aq) Ag2 O(s) + H2 O(l)

hope it helps u...