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Class 12 NEET Chemistry Electrochemistry Questions
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Question : 27
Total: 74
Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because
[NEET 2016 P2]
Zinc has higher negative electrode potential than iron
Zinc is lighter than iron
Zinc has lower melting point than iron
Zinc has lower negative electrode potential than iron
Validate
Solution:
º
E
Z
n
+
2
∕
Z
n
=
−
0.76
V
º
E
F
e
+
2
∕
F
e
=
−
0.76
V
Zn has higher negative SRP (Standard reduction potential) so it work as anode and protect iron to make iron as cathode.
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