A compound (x) with molar mass 108 g mol^{- | vedclass

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(C) Acetylation involves the replacement of a hydrogen atom $(-H)$ by an acetyl group $(-COCH_3)$.The net change in molar mass for each amino group $(

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$2$

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(C) Acetylation involves the replacement of a hydrogen atom $(-H)$ by an acetyl group $(-COCH_3)$.The net change in molar mass for each amino group $(-NH_2)$ reacting is the replacement of one $H$ atom (mass $1$) with one $COCH_3$ group (mass $43$).Gain in molecular weight per amino group $= 43 - 1 = 42 \ g \ mol^{-1}$.Total increase in molecular weight $= 192 - 108 = 84 \ g \ mol^{-1}$.Therefore,the number of amino groups in $(x) = \frac{84}{42} = 2$.

$A$ compound $(x)$ with molar mass $108 \ g \ mol^{-1}$ undergoes acetylation to give a product with molar mass $192 \ g \ mol^{-1}$. The number of amino groups in the compound $(x)$ is . . . . . .

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