Question

i) Benzyl chloride + $X$$\to$ Benzyl alcohol
ii) Ethyl magnesium chloride +$Y$$\to$ Propan-1-ol

What are X and Y in the above reactions?

• A. HCHO and NaOH
• B. NaOH and HCHO
• C. NaOH and $C{H}_{3}CHO$
• D. $alc.KOH$ and $C{H}_{3}CHO$

Answer 1

Answer: (B)

NaOH and HCHO

(i) In the given options NaOH provides $O{H}^{-}$ for substitution.

Hence X = NaOH.

(ii) $C_2{H}_{5}MgCl+Y\to C{H}_{3}C{H}_2-C{H}_{2}OH$

Addition of Grignard reagent with corresponding Aldehydes is reduced to alcohols.

For propanol, Grignard reagent has 1 carbon less. Therefore formaldehyde is added.

$Y=HCHO$