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Question

A salt which gives CO2 with hot H2SO4 and also decolourises acidified KMnO4 on warming is:


A

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B

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C

oxalate

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D

acetate

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Solution

The correct option is C

oxalate


Oxalates are stron reducing agents and decolourize acidified KMnO4

MnO4+8H++ 5eMn2++4H2O]×2 C2O242CO2+2e]×52MnO4+5C2O24+16H+Mn2++10CO2+8H2OCOOH|conc.H2SO4−−−−−−900CH2O+CO+CO2COOH


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