Question

How many moles of $C{H}_{3}OH$ required to react completely with $B$?

• A. $One$
• B. $Two$
• C. $Three$
• D. $Four$

Answer 1

The correct option is B $Two$

In first and step in absence of catalyst and in presence of UV light substitution of methyl group takes place and result in A, Then in presence of $NaOH$ it gives product B vice Carbene intermediate.Then on addition of ${CH}_{3}OH$ esterformation takes place.

As 2 $COOH$ group are present thus 2 moles of ${CH}_{3}OH$ are required.