3.9 Mention the reactions taking place at cathode and anode during electrolysis of acidita water with platinum electrodes.
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Answer:
Correct option is A)
During electrolysis of acidified water using platinum electrodes, hydrogen is liberated at the cathode.
At the cathode, H
+
+e
−
→
2
1
H
2
At the anode, OH
−
is oxidized to oxygen.
2OH
−
→O
2
+H
2
O+2e
−
2O→O
2
Hence the given statement is true.
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SIMILAR QUESTIONS
star-struck
Column 1 Column II
A) Dilute solution of HCl (P) O
2
evolved at anode
B) Dilute solution of KCl (Q) H
2
evolved at Cathode
C) Concentrate solution of NaCl (R) Cl
2
evolved at anode
D) Fairly concentrate solution of AgNO
3
(S) Ag deposition at cathode
Hard
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Assertion
When ZnSO
4
solution is acidified, Zn is deposited at the cathode and H
2
(g) is not evolved.
Reason
The eletrode potential of Zn is more negative than hydrogen.
Medium
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