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A solid (A) which has photographic effec...

A solid (A) which has photographic effect reacts with the solution of a sodium salt (B) to give a pale yellow ppt. (C). Sodium salt on heating gives brown vapour. Identify A, B and C

A

`AgNO_(3),NaBr,AgBr`

B

`AgNO_(3),NaCl, AgCl_(2)`

C

`AgNO_(3),NaBr,AgCl_(2)`

D

`AgCl,NaBr,AgBr_(2)`

Text Solution

Verified by Experts

The correct Answer is:
A
Sodium salt on heating gives brown vapour hence it can either be `NO_(2)^(-),NO_(3)^(-),Br^(-)`. A compound having photographic effect is silver nitrate. It is used in confirmatory test for halogens. Bromine, when reacted with conc. `HNO_(3)` and `AgBr` gives pale yellow ppt partially soluble in `NH_(4)OH`
`AgNO_(3)(aq) + NaBr(s) to underset("(Pale yellow ppt)")(AgBr) + NaNO_(3)(aq)`
Hence the given salt in NaBr .
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