\(2\, mole\) of \(CH_3 MgBr\) act as a base \(4\, mole\) of \(CH_3MgBr\) act as a
nucleophile Reaction \((2)\, y = 3\)
\(3\, mole\) of \(CH_3MgBr\) act as a nucleophile.
$ 3 \mathrm{ROH}+\mathrm{PCl}_3 \rightarrow 3 \mathrm{RCl}+\mathrm{A} $
$ \mathrm{ROH}+\mathrm{PCl}_5 \rightarrow \mathrm{RCl}+\mathrm{HCl}+\mathrm{B}$