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CuS is dissolved in dil. HNO(3). Balance...

`CuS` is dissolved in dil. `HNO_(3)`. Balanced equation with correct products is

A

`Cus+2H^(+)+3NO_(3)^(-) rarr Cu(NO_(3))_(2)+H_(2)S+H_(2)O+NO_(2)`

B

`3Cus+8H^(+)+8NO_(3)^(-) rarr 3Cu(NO_(3))_(2)+3S+4H_(2)O+2NO`

C

`Cus+4NO_(3)^(-) rarr Cu(NO_(3))_(2)+H_(2)S+H_(2)O`

D

None of the above in correct

Text Solution

Verified by Experts

The correct Answer is:
B
`CuS` (black ppt.) on boiling with `HNO_(3)` results in the formation of colloidal `S` and blue coloured solution of `Cu(NO_(3))_(2)`.
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