Redox Reactions And Electrochemistry Ques 354
Question: CuS is dissolved in dil. $ HNO_3 $ . Balanced equation with correct products is
Options:
A) $ CuS=2{{H}^{+}}=3N{{O}^{-}}_3\to Cu(NO_3+H_2S) $ $ +H_2O+NO_2 $
B) $ 3CuS=8{H^{+}}=8N{O^{-}}_3\to 3Cu{(NO_3)} _2+3S $ $ +4H_2O+2NO $
C) $ CuS+4N{{O}^{-}}_3\to Cu{{(NO_3)}_2}+H_2S+H_2O $
D) None of the above incorrect
Show Answer
Answer:
Correct Answer: B
Solution:
[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} $ .
