Question

Halide of an element when heated with Li Al H4 to give compound (B). Compound (B) reacts with
H2O to give compound (C) which is antiseptic. Identify A, B and C. Write down structure of
compound (B).

Answer 1

Dear User,
Ethanol is an antiseptic. Ethyl chloride on treatment with LiAlH4 reduces to its corresponding hydrocarbon i.e. ethane which on further reaction with water gives ethanol.
$$\begin{gathered} {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Cl}\stackrel{{\mathrm{LiAlH}}_4}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_3\stackrel{{\mathrm{H}}_2\mathrm{O}}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH} \\ \mathrm{Ethyl}\mathrm{chloride}\mathrm{Ethane}\mathrm{Ethanol} \\ \left(A\right)\left(B\right)\left(C\right) \end{gathered}$$