A) \[CuS=2{{H}^{+}}=3N{{O}^{-}}_{3}\to Cu(N{{O}_{3}}+{{H}_{2}}S)\]\[+{{H}_{2}}O+N{{O}_{2}}\]
B) \[3CuS=8{{H}^{+}}=8N{{O}^{-}}_{3}\to 3Cu{{(N{{O}_{3}})}_{2}}+3S\]\[+4{{H}_{2}}O+2N{{O}_{}}\]
C) \[CuS+4N{{O}^{-}}_{3}\to Cu{{(N{{O}_{3}})}_{2}}+{{H}_{2}}S+{{H}_{2}}O\]
D) None of the above incorrect
Correct Answer: B
Solution :
[b] \[CuS\](Black ppt.) on boiling with \[HN{{O}_{3}}\] results in the formation of colloidal S and blue coloured solution of\[Cu{{(N{{O}_{3}})}_{2}}\].
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