JEE Main 2022 (28 Jun, Shift 2) Chemistry Q76: Isobutyralde…

Question

Isobutyraldehyde on reaction with formaldehyde and $\mathrm{K_2CO_3}$ gives compound ‘A’. Compound ‘A’ reacts with KCN and yields compound ‘B’, which on hydrolysis gives a stable compound ‘C’. The compound ‘C’ is

Accepted Answer

Option 3: [figure: five-membered lactone ring (ring O, C=O carbon); ring carbon next to the C=O bears HO; next ring carbon bears two H3C groups; then ring CH2 bonded to the ring O]

Answer

[figure: open chain HO-CH$_2$-C-CH-COOH; CH$_3$ drawn above the C; below the C and CH two vertical bonds ending in the printed label "CH$_3$OH"]

Answer

$\mathrm{HO-CH_2CH_2-CH-CH-COOH}$ with CH$_3$ drawn below the first CH and OH drawn below the second CH

Answer

[figure: five-membered lactone ring (ring O, C=O carbon); ring carbon next to the C=O bears HO; next ring carbon bears two H3C groups; then ring CH2 bonded to the ring O]

Answer

[figure: five-membered lactone ring (ring O, C=O carbon); ring carbon next to the C=O bears two H3C groups; next ring carbon bears HO; then ring CH2 bonded to the ring O]

JEE Main 28 June 2022, Shift 2, Chemistry Q76

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