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JEE Main levelSingle correct optionDifficulty 2 of 3si242

The compound shown is completely hydrogenated over Pd/C. How many 1H NMR signals does the saturated product give? Chemically equivalent hydrogens give one signal; ignore coupling and axial/equatorial differences.

A $3$
B $4$
C $5$
D $6$

Answer: B

Hydrogenation of 2-methylbut-2-ene gives 2-methylbutane: two equivalent

CH X_{3}

on the CH, the CH, the

CH X_{2}

and the terminal

CH X_{3}

, so 4 signals.

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