Compound with molecular formula $\mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}$ can show:

(B) Both positional isomerism and metamerism

JEE Main · 2021 · 18 Mar 2021 · Shift 1 · General Organic Chemistry

Compound with molecular formula

C_{3} H_{6} O

can show:

(A)Metamerism
(B)Both positional isomerism and metamerism
(C)Positional isomerism
(D)Functional group isomerism✓ Correct

Answer: (D)

Solution

C_{3} H_{6} O

can exist as propanal (an aldehyde,

CH_{3} CH_{2} CHO

) or propanone/acetone (a ketone,

CH_{3} COCH_{3}

). These two compounds have the same molecular formula but different functional groups (aldehyde vs. ketone), so they exhibit functional group isomerism. The answer is (D).

JEE Main · 2021 · 18 Mar 2021 · Shift 1 · Single correct option

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