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

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 .
Read lesson note on Periodic Chemistry (Ghana Only) (WAEC)
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