Redox Reactions And Electrochemistry Question 206
CuS is dissolved in dil. $ HNO_3 $ . Balanced equation with correct products is $ 3CuS + 8HNO_3 \rightarrow 3Cu(NO_3)_2 + 2NO + 4H_2O + S $
Options:
A) $ CuS+2{{H}^{+}}+3N{{O}^{-}}_3\to Cu^{2+}+NO_2\uparrow +H_2O+S $
B) $ 3CuS + 8H^{+} + 8NO_3^{-} \to 3Cu(NO_3)_2 + 3S + 4H_2O + 2NO $
C) $ CuS+4NO_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} $ .
BETA
