Sodium fusion extract of an organic compound (Y) with CHCl 3 and chlorine water gives violet color to the CHCl 3 layer. 0.15 g of ( Y ) gave 0.12 g of the silver halide precipitate in Carius method. Percentage of halogen in the compound ( Y ) is \ \ \ \ . (Nearest integer). (Given : molar mass g mol -1 C : 12, H : 1, Cl : 35.5 , Br: 80, I : 127)

Chemistry · Practical Organic Chemistry

JEE Main 2026 — 22 January, Morning Shift — Question 69

Sodium fusion extract of an organic compound (Y) with $\mathrm{CHCl}_{3}$ and chlorine water gives violet color to the $\mathrm{CHCl}_{3}$ layer. 0.15 g of $(\mathrm{Y})$ gave 0.12 g of the silver halide precipitate in Carius method. Percentage of halogen in the compound $(\mathrm{Y})$ is $\_\_\_\_$ . (Nearest integer). (Given : molar mass $\mathrm{g} \mathrm{mol}^{-1} \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{Cl}: 35.5$ , Br: 80, I : 127)

Answer: 43

Numerical answer — enter this value.

Step-by-step solution

Iodine gives violet colour $\%$ of $\mathrm{I}=\frac{\text { Atomic weight of } \mathrm{I}}{\text { Molecular weight of } \mathrm{AgI}} \times \frac{\mathrm{m}}{\mathrm{W}} \times 100$ $=\frac{127}{235} \times \frac{0.12}{0.15} \times 100$ % of $\mathrm{I}=43.23 \% \approx 43 \%$

Answer key and solution verified before publishing.

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Exam: JEE Main 2026
Paper: 22 January, Morning Shift
Subject: Chemistry
Chapter: Practical Organic Chemistry
Topic: Quantitative organic analysis