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JAMB Chemistry 2019 Paper

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Question : 67

Total: 80

X is a substance which liberates CO

_2

on treatment with concentrated H

_2

_4

. A warm solution of X can decolorize acidified KMnO

_4

. X is

HCOOH
NaHCO $_3$
FeCO $_3$
H $_2$ C $_2$ O $_4$

Solution:

It should be noted that for X to liberate CO $_2$ , X must be a carbonate or an oxalate. Since X decolorizes KMnO $_4$ , X must be an oxalate.

Therefore, X is H $_2$ C $_2$ O $_4$ .

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