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Standard XII

Chemistry

Variable Oxidation States

Which is more...

Question

Which is more stable in the below given pair?
$M n O_{4}^{-}$ and $R e O_{4}^{-}$

M n O_{4}^{-} = R e O_{4}^{-}

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M n O_{4}^{-} < R e O_{4}^{-}

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M n O_{4}^{-} > R e O_{4}^{-}

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None of these

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Solution

The correct option is B $M n O_{4}^{-} < R e O_{4}^{-}$
The correct order of stability is $M n O_{4}^{-} < R e O_{4}^{-}$ .
On moving down the group, the stability of higher oxidation state increases.

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Similar questions

Which is more stable in the below given pair?

M n^{2 +}

M n^{3 +}

and

M n O_{4}^{-}

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ions can be reduced in strong alkaline medium to give

Q. Assertion :Teacher demonstrated that

(C_{2} O_{4}^{2 -})

oxalate ion decolourised

M n O_{4}^{-} / H^{+}

(white) and these precipitate also decolourised

M n O_{4}^{-} / H^{+}

. While performing salt analysis quickly, a student performed this experiment without precipitation of

C_{2} O_{4}^{2 -}

but salt given to him confirmed

M n O_{4}^{-} / H^{+}

test. He reported

C_{2} O_{4}^{2 -}

is oxidized by permanganate. Reason: Presence of

F e^{2 +}

in mixture also gave positive

M n O_{4}^{-} / H^{+}

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$M n O_{2}$ when fused with KOH and oxidized in air gives a dark green compound X. In acidic X. In acidic solution, X undergoes disproportion to give an intense purple compound Y and $M n O_{2}$ . The compounds X and Y respectively, are

Q. Find the magnitude of the standard electrode potential of

M n O_{4}^{-} / M n O_{2}

. The standard electrode potentials of

M n O_{4}^{-} / M n^{2 +} = 1.51 V

and

M n O_{2} / M n^{2 +} = 1.23 V

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Which is more stable in the below given pair?MnO−4 and ReO−4

The correct option is B MnO−4<ReO−4The correct order of stability is MnO−4<ReO−4. On moving down the group, the stability of higher oxidation state increases.

Which is more stable in the below given pair?
$M n O_{4}^{-}$ and $R e O_{4}^{-}$

The correct option is B $M n O_{4}^{-} < R e O_{4}^{-}$
The correct order of stability is $M n O_{4}^{-} < R e O_{4}^{-}$ .
On moving down the group, the stability of higher oxidation state increases.