A) deep blue precipitate of\[Cu{{(OH)}_{2}}\]
B) deep blue solution of \[{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}\]
C) deep blue solution of \[Cu{{(N{{O}_{3}})}_{2}}\]
D) deep blue solution of \[Cu{{(OH)}_{2}}.Cu{{(N{{O}_{3}})}_{2}}\]
Correct Answer: B
Solution :
\[\underset{Salt}{\mathop{CuS{{O}_{4}}}}\,+{{H}_{2}}S\xrightarrow[{}]{{}}\underset{black\,ppt}{\mathop{CuS}}\,+{{H}_{2}}S{{O}_{4}};\] \[CuS+2HN{{O}_{3}}\xrightarrow[{}]{{}}\underset{blue\,solution}{\mathop{Cu{{(N{{O}_{3}})}_{2}}}}\,+{{H}_{2}}S;\] \[Cu{{(N{{O}_{3}})}_{2}}+4N{{H}_{3}}\xrightarrow[{}]{{}}\underset{deep\,blue\,solution}{\mathop{{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}}}\,+2NO_{3}^{-}\]You need to login to perform this action.
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