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Question
Chemistry
Assertion: Galvanised iron does not rust. Reason: Zinc has a more negative electrode potential than iron.
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Q.
Assertion :
Galvanised iron does not rust.
Reason :
Zinc has a more negative electrode potential than iron.
AIIMS
AIIMS 2005
Electrochemistry
A
If both assertion and reason are true and reason is the correct explanation of assertion
49%
B
If both assertion and reason are true but reason is not the correct explanation of assertion
20%
C
If assertion is true but reason is false
17%
D
If both assertion and reason are false
14%
Solution:
Galvanised iron i.e., iron coated with zinc does not rust easily as zinc has more negative electrode potential (- 0.76\,V) than iron. $(-0.41\, V )$ i.e., zinc is lesser reactive than iron.