D-And F-Block Elements Ques 480
Question: $ CuSO_4(aq.)\xrightarrow{H_2S\uparrow }M\downarrow \xrightarrow[of,KCN]{Excess}N+O $ Then final products N and O are respectively.
Options:
A) $ {{[Cu{{(CN)}_4}]}^{3-}},{{(CN)}_2} $
B) $ CuCN,{{(CN)}_2} $
C) $ {{[Cu{{(CN)}_4}]}^{2-}},{{(CN)}_2} $
D) $ Cu{{( CN )}_2},K_2S $
Show Answer
Answer:
Correct Answer: A
Solution:
$ CuSO_4( aq. )\xrightarrow{H_2S}\underset{\begin{smallmatrix} Blanck,ppt. \\ (M) \end{smallmatrix}}{\mathop{2CuS}},~\xrightarrow[Excess]{KCN} $ $ {{[ \underset{(N)}{\mathop{Cu}},{{( CN )}_4} ]}^{3}}^{-}+\underset{(O)}{\mathop{{{( CN )}_2}}},\uparrow $
