JEE Main 2024 — Chemistry Organic Chemistry

2024integerhard

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

Official previous-year question

Held on 1 Feb 2024 · Verified 6 Jul 2026.

Did you get this right?

Solution

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

Equivalent of ${\mathrm{NH}}_{3}=$ Equivalent of ${H}_{2}{\mathrm{SO}}_{4}$

moles of ${\mathrm{NH}}_{3}({n}_{{\mathrm{NH}}_{3}})$ $\times 1=\frac{2\times 10\times 2}{1000}$

$=4\times {10}^{-2}\mathrm{moles}$

Moles of nitrogen $=4\times {10}^{-2}\mathrm{moles}$

Weight of Nitrogen $=4\times {10}^{-2}\times 14 =56\times {10}^{-2}\mathrm{gm}$

Percent of nitrogen $=\frac{56\times {10}^{-2}}{\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{compound}}\times 100 =\frac{56\times {10}^{-2}}{1}\times 100=56%$

Your note

JEE Main Organic Chemistry in other years

Organic Chemistry 2026 Organic Chemistry 2025 Organic Chemistry 2023 Organic Chemistry 2022 Organic Chemistry 2021 Organic Chemistry 2020 Organic Chemistry 2019 Organic Chemistry 2018 Organic Chemistry 2017 Organic Chemistry 2016 Organic Chemistry 2015 Organic Chemistry 2014

More JEE Main Organic Chemistry questions

Consider the following reaction sequence ![JEE Main 2026 Chemistry, Alcohols Phenols and Ethers — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Alcohols_Phenols_and_Ethers/6983c1ad8bfdbb24356397bb/question_1__q_6983c1ad8bfdbb24356397bb__cdn-question-pool.getmarks.app__28S1_q_52_1_v2__2fe787b06d_final_ppt_sync.png) Compound $(\mathrm{y})$ develops characteristic colour with neutral $\mathrm{FeCl}_{3}$ solution. Identify the INCORRECT statement from the following for the above sequence.

2026medium

Given below are two statements: Statement I: Benzene is nitrated to give nitrobenzene, which on further treatment with $\mathrm{CH}_{3} \mathrm{COCl} / \mathrm{AlCl}_{3}$ will give ![JEE Main 2026 Chemistry, Hydrocarbons — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/615f0e999476412f48314daf/Chemistry/images/Hydrocarbons/6983c1898bfdbb24356395fc/question_1__q_6983c1898bfdbb24356395fc__cdn-question-pool.getmarks.app__22S1_q_54_1__65f8139d89_final_ppt_sync.png) Statement II: $-\mathrm{NO}_{2}$ group is a $m$-directing, and deactivating group. In the light of the above statements, choose the most appropriate answer from the options given below

2026medium

Given below are two statements: Statement I: $\left(\mathrm{CH}_{3}\right)_{3} \stackrel{\oplus}{\mathrm{C}}$ is more stable than $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}$ as nine hyperconjugation interactions are possible in $\left(\mathrm{CH}_{3}\right)_{3} \stackrel{\oplus}{\mathrm{C}}$. Statement II: $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}$ is less stable than $\left(\mathrm{CH}_{3}\right)_{3} \stackrel{\oplus}{\mathrm{C}}$ as only three hyperconjugation interactions are possible in $\stackrel{\oplus}{\mathrm{C}} \mathrm{H}_{3}$. In the light of the above statements, choose the correct answer from the options given below

2026medium

Which of the following reactions is an example of Wurtz reaction?

2026easy

A hydroxy compound $(\mathrm{X})$ with molar mass $122 \mathrm{~g} \mathrm{~mol}^{-1}$ is acetylated with acetic anhydride, using a large excess of the reagent ensuring complete acetylation of all hydroxyl groups. The product obtained has a molar mass of $290 \mathrm{~g} \mathrm{~mol}^{-1}$. The number of hydroxyl groups present in compound (X) is:

2026medium

View all Organic Chemistry questions

Keep practicing Organic Chemistry

Work through every JEE Main Organic Chemistry PYQ, year by year.

Browse all Chemistry topics

Solution

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

Equivalent of ${\mathrm{NH}}_{3}=$ Equivalent of ${H}_{2}{\mathrm{SO}}_{4}$

moles of ${\mathrm{NH}}_{3}({n}_{{\mathrm{NH}}_{3}})$ $\times 1=\frac{2\times 10\times 2}{1000}$

$=4\times {10}^{-2}\mathrm{moles}$

Moles of nitrogen $=4\times {10}^{-2}\mathrm{moles}$

Weight of Nitrogen $=4\times {10}^{-2}\times 14 =56\times {10}^{-2}\mathrm{gm}$

Percent of nitrogen $=\frac{56\times {10}^{-2}}{\mathrm{weight}\mathrm{of}\mathrm{the}\mathrm{compound}}\times 100 =\frac{56\times {10}^{-2}}{1}\times 100=56%$

JEE Main 2024 — Chemistry Organic Chemistry

Did you get this right?

Solution

Your note

JEE Main Organic Chemistry in other years

More JEE Main Organic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

Inorganic Chemistry

Keep practicing Organic Chemistry

JEE Main 2024 — Chemistry Organic Chemistry

Did you get this right?

Solution

Your note

JEE Main Organic Chemistry in other years

More JEE Main Organic Chemistry questions

Other Chemistry topics for JEE Main

Physical Chemistry

Inorganic Chemistry

Keep practicing Organic Chemistry