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JEE Main levelSingle correct optionDifficulty 2 of 3hc042

2-Methylpropene is treated with hot concentrated acidified $KMnO X_{4}$ . The products are

Apropanone and $CO X_{2}$ (with $H X_{2} O$ )
Bpropanone and methanoic acid that survives as such
Cpropanoic acid and methanal
Dethanoic acid and ethanal

Answer: A

(CH X_{3}) X_{2} C = CH X_{2}

is cleaved to

(CH X_{3}) X_{2} C = O

and

HCHO

. Methanal is oxidised by the hot permanganate first to methanoic acid and then to

CO X_{2}

and

H X_{2} O

. The ketone resists oxidation.

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