1.

A soild, A which has photographic effect reacts with the solution of a sodium salt B to give a pale yellow precipitate C. Sodium salt on heatinggives brown vapours. Identity A,B and C.

Answer»

`AgNO_(3),NaBr,AgBr`
`AgNo_(3),NaCl,AgNO_(3)`
`AgNO_(3),NaBr,AgCl_(2)`
`AGCL,NaBr,AgBr_(2)`

Solution :A solid silver nitrate `[AgNO_(3)(A)]` which has photographic effect reacts with the solution of NaBr (B) to give a pale YELLOW ppt. of AgBr which experience difficulty to be SOLUBLE in `NH_(4)OH NaBr` (B) on heating brown vapours of bromine.
`underset(A)(AgNO_(3))+underset(B)(NaBr)rarrunderset(underset("Light yellow ppt.")(C))(AgBr+NaNO_(3))`


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