In which test tubes, the rusting of iron nail will take place?
a and d
a, b and d
b and c
b, c and d
A
a and d
B
b, c and d
C
a, b and d
D
b and c
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Solution
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The correct option is B a, b and d Rusting of iron takes place only in presence of oxygen and water vapours. In figure (c) rusting is not possible as supply of oxygen is blocked by oil layer.
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