Redox Reactions And Electrochemistry Ques 278
Question: The platinum electrodes were immersed in a solution of cupric sulphate and electric current passed through the solution. After some time it was found that colour of copper sulphate disappeared with evolution of gas at the electrode. The colourless solution contains [NCERT 1984]
Options:
A) Platinum sulphate
B) Copper hydroxide
C) Copper sulphate
D) Sulphuric acid
Show Answer
Answer:
Correct Answer: D
Solution:
During electrolysis of $ CuSO_4 $ . $ C{u^{2+}} $ gets discharged at cathode and $ O{H^{-}} $ at anode. Thus solution becomes acidic due to excess of $ {H^{+}} $ and $ SO_4^{2-} $ or $ H_2SO_4 $ .
