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Standard XII

Chemistry

Electrode Potential

If the H+ c...

Question

If the $H^{+}$ concentration decreased from 1 M to $10^{- 4}$ M at $25^{o} C$ for the couple $M n O_{4}^{-} / M n^{2 +}$ , then the oxidising power of the $M n O_{4}^{-} / M n^{2 +}$ couple decreases by

-0.18V

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0.38V

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-0.38V

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Solution

The correct option is D 0.38V

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Similar questions

Q. If the

H^{+}

concentration is decreased from

1 M

10^{- 4} M

25^{o} C

for the couple

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

, then the oxidising power of the

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

couple decreases by :

The magnitude of the change in oxidising power of the $M n O_{4}^{-} / M n^{2 +}$ couple is $x \times 10^{- 4} V$ , if the $H^{+}$ concentration is decreased from $1 M$ to $10^{- 4} M$ at $25 ° C$ . (Assume concentration of $M n O_{4}^{-}$ and $M n^{2 +}$ to be same on change in $H^{+}$ concentration). The value of $x$ is . (Round off to the nearest integer).

[Given: $2.30 R T / F = 0.059$ ]

Q. By how much would the oxidising power of the

(M n O_{4}^{-} | M n^{2 +})

couple change if the

H^{+}

ions concentration is decreased

100

times at

25^{\circ} C

Q. The extent of the oxidising power of (1 M)

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

(1 M) couple decreased if the

H^{+}

concentration is decreased for 1 M to

10^{- 4}

M at

25^{o}

C is:

By how much would the oxidizing power of the $M n O_{4}^{-} / M n^{2 +}$ couple change if the $H^{+}$ ions concentration is decreased to a hundredth of its initial value?

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If the H+ concentration decreased from 1 M to 10−4 M at 25oC for the couple MnO−4/Mn2+, then the oxidising power of the MnO−4/Mn2+ couple decreases by

The correct option is D 0.38V

If the $H^{+}$ concentration decreased from 1 M to $10^{- 4}$ M at $25^{o} C$ for the couple $M n O_{4}^{-} / M n^{2 +}$ , then the oxidising power of the $M n O_{4}^{-} / M n^{2 +}$ couple decreases by