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Ammonia reacts with K(2)[HgI(4)]in the p...

Ammonia reacts with `K_(2)[HgI_(4)]`in the presence of `KOH`solution to give a

A

grey precipitate

B

dark red precipitate

C

brown precipitate

D

black precipitate

Text Solution

Verified by Experts

The correct Answer is:
3
With Nessler's (an alkaline solution of `K_(2)Hgl_(4))`ammonia or ammonia salts give a reddish brown precipitate due to the formation of iodide of Millon's base:
`2K_(2)[Hgl_(4)]+NH_(3)+3KOHrarr underset("(brown ppt)")underset("Iodide of Millon's base")(H_(2)N-Hg-O-Hg-I)`
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