JEE Main · 2024 · 06 Apr 2024 · Shift 1 · Compounds Containing Nitrogen

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9.3 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)

Answer: 20

Solution

9.3

g aniline

= \frac{9.3}{93} = 0.1

mol. Diazotisation followed by coupling with phenol gives 1 mol of azo dye per mol of aniline, so

0.1

mol of

p

-hydroxyazobenzene (

M \approx 198

g/mol).
Mass

= 0.1 \times 198 = 19.8 \approx 20

JEE Main · 2024 · 06 Apr 2024 · Shift 1 · Integer answer

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