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The equation 3MnO4^(2-)+4H^(+)to2MnO4^...

The equation
`3MnO_4^(2-)+4H^(+)to2MnO_4^(-)+MnO_2+2H_2O` represents

A

reduction

B

disproportionation

C

oxidation in acidic medium

D

reduction in acidic medium.

Text Solution

Verified by Experts

The correct Answer is:
B
`overset(+6)(MnO_4^(2-))+4H^(+)tooverset(+7)(MnO_4^(-))+overset(+4)(2MnO_2)+2H_2O`
shows disproportonation since the oxidation state of Mn changes from +6 to +7 `(MnO_4^(-))` and +4(MnO_2)`.
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Which of the following reactions are disproportionation reactions ? (i) Cu^(+) to Cu^(2+) + Cu (ii) 3MnO_4^(2-) + 4H^(+ ) to 2MnO_4^(-) + MnO_2 + 2H_2O (iii) 2KMnO_4 to K_2 MnO_4 + MnO_2 + O_2 (iv) 2MnO_4^(-) + 3Mn^(2+) + 2H_2O to 5MnO_2 + 4H^+

In acidic medium,potassium manganate undergoes disproportionation according to equation. 3MnO_(4)^(2-)+4H^(+)longrightarrow2MnO_(4)^(-)+MnO_(2)+2H_(2)O Equivalent weight of K_(2)MnO_(4) will be (Mol.wt.of K_(2)MnO_(4) =M)

Complete and balance the following chemical equations: (a) Fe^(2+) + MnO_4^(-) + H^(+)to (b) MnO_4^(-) + H_2O + I^(-) to

KMnO_(4) can be prepared from K_(2)MnO_(4) as per the reaction 3MnO_(4)^(2-) + 2H_(2)O hArr 2MnO_(4)^(2-) + MnO_2 + 4OH^- The reaction can go to completion by removing OH^(-) ions by adding.

NCERT FINGERTIPS-THE D- AND F- BLOCK ELEMENTS -Some Important Compounds Of Transition Elements
  1. Acidified potassium dichromate reacts with potassium iodide and oxidie...

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  2. One mole of acidified K(2)Cr(2)O(7) on reaction with excess of KCl wil...

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  3. What would happen when a solution of potassium chromate is treated wit...

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  4. Identify the correct structure of dichromate ion.

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  5. In the dichromate anion (Cr2O7^(2-))

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  6. When MnO2 is fused with KOH and O2, what is the product formed and its...

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  7. The equation 3MnO4^(2-)+4H^(+)to2MnO4^(-)+MnO2+2H2O represents

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  8. Explain why does colour of KMnO(4) disappear when oxalic acid is added...

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  9. Complete the given reactions. (A) 2MnO4^(-)+H2O+I^(-)to2ul((i))+2O...

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  10. The number of moles of KMnO(4) that will be needed to react completely...

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  11. Complete the given reaction. 2Mn^(2+)+5ul((i))+8H2Oto2ul((ii))+10ul...

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  12. Which of the following is correct representation of reaction of acidif...

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  13. Which of the following reactions is not correct ?

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  14. A solution of KMnO4 is reduced to various products depending upon its ...

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  15. In acidic medium, KMnO4 oxidises FeSO4 solution. Which of the followin...

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  16. Complate the following reactions. (i) Cr2O7^(2-)+3SO2+2H^(+)to2Cr^(3...

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  17. Complete the following reactions. (i) MnO4^(-)+2H2O+3e^(-)to""+4OH^...

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  18. Fill the missing products in the following reactions. (i) 2MnI4^(-...

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  19. When an oxide of manganese (P) is fused with KOH in the presence of an...

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  20. A violet compound of manganese (P) decomposes on heating to liberate o...

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