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Reaction of KMnO4 in neutral or very wea...

Reaction of `KMnO_4` in neutral or very weakly acidic solution can be represented as

A

`MnO_(4)^(-) + 2H_2O+3e^(-) rarr MnO_(2) + 4OH^(-)`

B

`2MnO_(4)^(-) + 2OH^(-) rarr 2MnO_(4)^(2-) + 1//2O_2 + H_2O`

C

`MnO_(4)^(-) + 8H^(+) + 5e^(-) rarr Mn^(2+) + 4H_(2)O`

D

`MnO_(4)^(-) + e^(-) rarr MnO_(4)^(2-)`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-2 (PRMANGANATE AND DICHROMATE)
  1. Acedified K2Cr2O7 cannot oxidise

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  2. Number of electrons transferred in each case when KMnO(4) acts as an o...

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  3. KMnO(4) is powerful oxidant where it converts into

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  4. Four moles of KMnO(4) reacts with excess of hypo solution to produce -...

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  5. An acidified solution of KMnO(4) oxidises

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  6. Incorrect statement regarding the structure of dichromate is

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  7. Reaction of KMnO4 in neutral or very weakly acidic solution can be rep...

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  8. K2Cr2O7 cannot be used for

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  9. A solution of potassium chromate is treated with an excess of dilute n...

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  10. The natures of the oxides CrO and CrO3, respectively

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  11. When acidified solution of potassium dichromate is shaken with aqueous...

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  12. In the dichromate dianion

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  13. The equilibrium Cr2O7^(2-) hArr 2CrO4^(2-)

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  14. Which of the following oxides of chromium is amphoteric in nature

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  15. Potassium permanganate acts as an oxidant in neutral, alkaline as well...

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  16. When KMnO4 is added to oxalic acid, the decolourisation is slow in the...

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  17. Acidified KMnO4 oxidizes nitrites to

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  18. Permanganate ion oxidize S2O3^(2-) in fairly alkaline solutions to giv...

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  19. When MnO(2) is fused with KOH in the presence of air, a coloured compo...

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