Question

The structures of compounds J, K and L, respectively, are

• A. $PhCOC{H}_3,PhC{H}_{2}COC{H}_3$ and $PhC{H}_{2}CO{O}^{-}{K}^{+}$
• B. $PhCHO,PhC{H}_{2}CHO$ and $PhCO{O}^{-}{K}^{+}$
• C. $PhCOC{H}_3,PhC{H}_{2}CHO$ and $C{H}_{3}CO{O}^{-}{K}^{+}$
• D. $PhCHO,PhCOC{H}_3$ and $PhCO{O}^{-}{K}^{+}$

Answer 1

Answer: (D)

from given information

Refer image I.

(1) reaction of (I) with $KOH$ suggest that it is cannizzaro reaction therefore $\left(L\right)$ must be $PhCOOK$ and $\left(J\right)$ is $\left(PhCHO\right)$

(ii) structure of (M) is given and it is $\alpha -\beta$ unsaturated ketone, If suggest that $\left(M\right)$ is obtained by adole Rxn of $\left(x\right)$ So proceed reverse to get structure of $\left(K\right)$

Refer image ,(II)

(iii) again proceed reverse to get structure of (1) and (4),