A) Heating of acetic acid
B) Action of nitric acid on glucose
C) Acidic hydrolysis of cyanogen
D) Strong heating of sodium formate
Correct Answer: C
Solution :
Oxalic acid is prepared by the acidic hydrolysis of cyanogen. \[\underset{C\equiv N}{\overset{C\equiv N}{\mathop{|}}}\,\xrightarrow{{{H}_{2}}O/{{H}^{+}}}\underset{\text{oxalic}\,\text{acid}}{\mathop{\underset{COOH}{\overset{COOH}{\mathop{|}}}\,}}\,\]
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