Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of 2 M H 2 SO 4 . The percentage of nitrogen in the compound is \% .

Chemistry · Practical Organic Chemistry

JEE Main 2024 — 1 February, Shift 2 — Question 80

Following Kjeldahl's method, 1 g of organic compound released ammonia, that neutralised 10 mL of $2 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}$ . The percentage of nitrogen in the compound is $\qquad$ $\%$ .

Answer: 56

Numerical answer — enter this value.

Step-by-step solution

$\mathrm{H}_{2} \mathrm{SO}_{4}+2 \mathrm{NH}_{3} \rightarrow\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}$

Millimole of $\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow 10 \times 2$

So Millimole of $\mathrm{NH}_{3}=20 \times 2=40$

$\therefore$ Mole of $\mathrm{N}=\frac{40}{1000}$

wt. of $\mathrm{N}=\frac{40}{1000} \times 14$ $\%$

composition of N in organic compound $=\frac{40 \times 14}{1000 \times 1} \times 100$ $=56 \%$

Answer key and solution verified before publishing.

Practise Practical Organic Chemistry

Start with this question, then two more from the same chapter — with a tutor that explains every step. Free.

Solve a similar one free

Exam: JEE Main 2024
Paper: 1 February, Shift 2
Subject: Chemistry
Chapter: Practical Organic Chemistry
Topic: Quantitative organic analysis

Lassaigne's test is used for detection of :

Answer: 56

Step-by-step solution

Practise Practical Organic Chemistry

More Practical Organic Chemistry questions from this paper