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JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

1 Medium

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Analyzing +4 | -1

Assertion (A) : In the following half reaction:

\mathrm{Cr}_2 \mathrm{O}_7^{2-} \longrightarrow \mathrm{Cr}^{3+}

Equivalent weight of

\mathrm{Cr}_2 \mathrm{O}_7^{2-}=\frac{\text { Molar mass }}{3}

Reason (R) : Change in oxidation number of chromium is 3 per atom.

View answer and explanation

Correct option: D

\mathbf{A}

is false but

\mathbf{R}

is true.

Option D is correct because the assertion is false; the equivalent weight is molar mass divided by 6, not 3. The reason is true; the change in oxidation number of chromium is 3 per atom.

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