X is a substance which liberates $ \mathrm{CO_2} $ on treatment with concentrated $ \mathrm{H_2SO_4} $. A warm solution of X can decolorize acidified \(...

Assessment: JAMB UTME - Chemistry - 2019 Subject: Chemistry

Question 1 Report

X is a substance which liberates $ \mathrm{CO_2} $ on treatment with concentrated $ \mathrm{H_2SO_4} $. A warm solution of X can decolorize acidified $ \mathrm{KMnO_4} $. X is

HCOOH

NaHCO

_{3}

FeCO

_{3}

H

_{2}

C

_{2}

O

_{4}

Answer Details

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 $_{4}$ .