Question

Assertion (A) : Chromium can be used as a protective and non-corrosive plating on other metals.

Reason (R): Due to atmospheric oxidation, chemically a inert layer of

\mathrm{Cr}_2 \mathrm{O}_3

is formed.

Accepted Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not the correct explanation of $\mathbf{A}$.

Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$.

Answer

$\mathbf{A}$ is true but $\mathbf{R}$ is false.

Answer

$\mathbf{A}$ is false but $\mathbf{R}$ is true.

JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

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