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