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  4. Equivalent weight of C6H5CHO is equal to molar mass in the following reaction. <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/chemistry/c07ec6301309c5894c081a7f15e3d2ad-.jpeg /> Thus, species (A) is

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Q. Equivalent weight of $C_{6}H_{5}CHO$ is equal to molar mass in the following reaction.
image
Thus, species (A) is

Redox Reactions

Solution:

image
Gain of one O-atom
image $\equiv1\left(O\right)\equiv16 g\equiv8\times2 g\left(O\right) \frac{M}{2}\equiv8g\left(O\right)$
Thus, E (oxidation part) =$\frac{M}{2}$
Since, E (net) = M
Hence, E (reduction part) = $\frac{M}{2}$
image
$\therefore $ E (reduction) =$\frac{M}{2}$
Hence, A is image $CH_{2}OH$