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When KMnO4 solution is added to oxalic a...

When `KMnO_4` solution is added to oxalic acid solution, the decolourisation is slow in the beginning but becomes instantaneous after some time because

A

`Mn^(2+)` acts as auto catalyst

B

`CO_(2)` is formed

C

Reaction is exothermic

D

`MnO_(4)^(-)` catalyst the reaction

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The correct Answer is:
A
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VK JAISWAL ENGLISH-d-BLOCK ELEMENTS-ASSERTION-REASON TYPE QUESTIONS
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  2. Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...

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  3. Cu((aq.))^+ has less stable nature than Cu((aq.))^(2+) but Fe((aq.))^(...

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  4. Assertion: Zn gives H(2) gas with dil. HCl and also with dil. H(2)SO(4...

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  5. Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...

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  6. Assertion: Cu^(2+) is more stable than Cu^(+) Reason: Electrode pote...

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  7. Statement 1: Concentrated solution of CuCl(2) in water is yellow in co...

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  12. Assertion: FeSO(4) and Fe(2)(SO(4))(3) undergoes intramolecular redox ...

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  13. Assertion: Zn(OH)(2) is dissolved in both NH(4)OH and NaOH solution Re...

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  15. Assertion: AgNO(3) reacts with KCN to form white ppt. of AgCN. This wh...

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  16. Assertion: Zero and negative oxidation state of d-block metal ion are ...

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  17. Assertion: Aquated copper(I) cation undergoes disproportionation as: ...

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  18. Assertion: Melting point of Mn is more than that of Fe. Reason : Mn ...

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  19. Assertion: Cu^(2+)(aq) is less than Cu^(3+)(aq) but Fe^(3+) is more st...

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  20. Assertion: Zn gives H(2) gas with dil. HCl and dil. H(2)SO(4) but not...

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  21. Assertion: KMnO(4) has different equivalent wieghts in acid, neutral o...

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