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JEE Main levelSingle correct optionDifficulty 2 of 3ap136

2-Methyloxirane is treated with $CH X_{3} ONa$ in methanol and then neutralised. The major product is

A2-methoxypropane
B1-methoxypropan-2-ol
C2-methoxypropan-1-ol
Dpropane-1,2-diol

Answer: B

Under basic conditions the strong nucleophile methoxide attacks the less hindered carbon of the epoxide (

CH X_{2}

) by SN2. The resulting alkoxide on the secondary carbon is protonated to give

CH X_{3} O - CH X_{2} - CH (OH) - CH X_{3}

.

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