A) 90
B) 63
C) 53
D) 45
Correct Answer: B
Solution :
Oxalic acid is \[\underset{COOH}{\overset{COOH}{\mathop{|}}}\,2{{H}_{2}}O\] Equivalent mass \[=\frac{\text{mol}\text{.wt}\text{.}}{\text{basicity}}=\frac{126}{2}=63\]
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