MCQ
For two statements are given$-$one labelled Assertion $(A)$ and the other labelled Reason $(R).$ Select the correct answer to these questions from the codes $(a), (b), (c)$ and $(d)$ as given below:
Assertion: Following reaction describes the rusting of iron and is a redox reaction.
$\ce{4Fe + 3O_2 \rightarrow 4Fe^{3+} + 60^{2-}.}$​​​​​​​
Reason: The metallic iron is oxidised to $Fe^{3+}.$
  • Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
  • B
    Both $A$ and $R$ are true, but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true, but $R$ is false.
  • D
    $A$ is false, but $R$ is true.

Answer

Correct option: A.
Both $A$ and $R$ are true, and $R$ is correct explanation of the assertion.
Fe is oxidised to $Fe^{3+}$ and acts as reducing.

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