Answer:
1000 ml of 1 M NaOH will
neutralize acid \[=\frac{1.22}{50\times 0.2}\times 1000=122\,g\]
But 1000 ml of 1 M NaOH contain 1 mole
of NaOH and will neutralize 1 mole of monobasic acid. Hence, molar mass of
benzoic acid \[=122\,g\,\text{mo}{{\text{l}}^{-1}}\].
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