Chemistry · Nitrogen Containing Organic Compounds

JEE Main 2025 — 29 January, Morning Shift — Question 18

Given below are some nitrogen containing compounds.

Each of them is treated with HCl separately. 1.0 g of the most basic compound will consume $\_\_\_\_\_$ mg of HCl . (Given molar mass in $\mathrm{g} \mathrm{mol}^{-1}, \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16, \mathrm{Cl} : 35.5)$ .

Answer: 341

Numerical answer — enter this value.

Step-by-step solution

The most basic compound is benzylamine, $\mathrm{C_6H_5CH_2NH_2}$ .

Molar mass of benzylamine, $M = 7(12) + 9(1) + 14 = 107\,\mathrm{g\,mol^{-1}}$

Moles in $1.0\,\mathrm{g}$ , $n = \dfrac{1}{107} = 0.0093458\,\mathrm{mol}$

Reaction: $\mathrm{C_6H_5CH_2NH_2 + HCl \rightarrow C_6H_5CH_2NH_3^+Cl^-}$

Thus, moles of HCl required $= 0.0093458$

Molar mass of HCl $= 36.5\,\mathrm{g\,mol^{-1}}$

$m(\mathrm{HCl}) = 0.0093458 \times 36.5 = 0.3411\,\mathrm{g} = 341.1\,\mathrm{mg}$

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Exam: JEE Main 2025
Paper: 29 January, Morning Shift
Subject: Chemistry
Chapter: Nitrogen Containing Organic Compounds
Topic: Chemical properties of Amines

Answer: 341

Step-by-step solution

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