Chemistry - Carbonyl compounds Question with Solution | TestHub

Question Explanation:

Calculating molar mass ratio for product C .

Concept:

Perkin Reaction and Decarboxylation.

Solution:

Benzaldehyde reacts with acetic anhydride (Perkin reaction) to form cinnamic acid (A). Cinnamic acid undergoes decarboxylation to form Styrene (C).

Styrene $\left({\mathrm{C}}_8{\mathrm{H}}_8\right)$ molar mass $\mathrm{M}=104$. Therefore, $\mathrm{M}/5=104/5=20.80$.

0.1 mole of PhCHO gives 0.1 mole of Ph – CH = CHCHO (B)

$\therefore$ W _PhCHCHCHO = $\frac{132}{10}=13.20$ gm