JEE Advanced 2025 · Paper 1 · Chemistry Q12

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ChemistryNumerical+4Question 44 of 48

The monomer (X) involved in the synthesis of Nylon 6,6 gives positive carbylamine test. If 10 moles of X are analyzed using Dumas method, the amount (in grams) of nitrogen gas evolved is _____.

Use: Atomic mass of N (in amu) = 14

Your answer

Answer and worked solution

Official answer: 280

X. Nylon 6,6 is made from hexamethylenediamine and adipic acid. X is the one giving a positive carbylamine test (a primary amine): hexamethylenediamine, $\ce{H2N(CH2)6NH2}$ , with 2 N per molecule.

Dumas method. All of the nitrogen is released as $\ce{N2}$ . 10 mol X contains 20 mol N, which gives 10 mol $\ce{N2}$ :
$10\times28=280\ \text{g}.$

Topics:Qualitative and quantitative analysis of organic compounds Amines

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JEE Advanced 2025 · Paper 1, Chemistry question 12