On treatment of NiS with aqua regia a gas "A" is released along with ppt. B. Same gas "A" is released when $CoCl_{2}$ is treated with $KNO_{2}$ in acetic acid medium along with ppt. "Z".
The colour of "B" & "Z" respectively is.

Question

On treatment of NiS with aqua regia a gas "A" is released along with ppt. B. Same gas "A" is released when $CoCl_{2}$ is treated with $KNO_{2}$ in acetic acid medium along with ppt. "Z".

The colour of "B" & "Z" respectively is.

TestHub · Accepted Answer

3 NiS + 2 HNO 3 ​ + 6 HCl CoCl 2 ​ + 7 KNO 2 ​ + 2 CH 3 ​ COOH ​ → 3 NiCl 2 ​ + 2 NO + 3 S + 4 H 2 ​ O → K 3 ​ [ Co ( NO 2 ​ ) 6 ​ ] ↓ + 2 KCl + 2 CH 3 ​ COOK + NO + H 2 ​ O ​

Chemistry - Salt Analysis Question with Solution | TestHub

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