Q.

Zinc can be coated on iron to produce galvanized iron but the reverse is not possible. It is because

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a

zinc is lighter than iron

b

zinc has lower melting point than iron

c

zinc has lower negative electrode potential than iron

d

zinc has higher negative electrode potential than iron

answer is D.

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Detailed Solution

Reduction potential values ofEZn2+/Zn°=-0.76 V and EFe2+/Fe°=-0.44 VThus, due to higher negative electrode potential value of zinc than iron, iron cannot be coated on zinc.
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