(9.3 ~g) of pure aniline upon diazotisation followed by coupling...

(9.3 \mathrm{~g}) of pure aniline upon diazotisation followed by coupling with phenol gives an orange dye. The mass of orange dye produced (assume 100\% yield/conversion) is _______ g. (nearest integer)

Correct answer

Step-by-step solution

Reaction suggests that 1 mole of aniline give 1 mole of orange dye.

\begin{aligned} & \text{ so }(\mathrm{mol})_{\text{aniline }}=(\mathrm{mole})_{\text{orange dye }} \\ & \frac{9.3 \mathrm{ g}}{93 \mathrm{ g} \mathrm{ mol}^{-1}}=\frac{\text{ mass of orange dye }}{199 \mathrm{ g} \mathrm{ mol}^{-1}} \end{aligned}

mass of orange dye

=19.9 \mathrm{ g} \simeq 20 \mathrm{ g}

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