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Amines

JEE Main 2024 (Online) 6th April Evening ShiftNumericalMedium📈 Topic in 46% papers+4
Ques. 1JEE Main 2024, 6 April (Evening Shift)

An amine (X) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine (X) formed is g mol-1. (Given molar mass in g mol-1 C : 12, H : 1, O : 16, N : 14)

Answer

287

Solution

∵ 1° and 2° amines (N–H present) react with p-toluenesulphonyl chloride to give a sulphonamide; a 3° amine has no N–H ⇒ no reaction ⇒ solution remains clear ⇒ X is a 3° amine

3C6H5CH2Cl + NH3 (C6H5CH2)3N + 3HCl

X = tribenzylamine, C21H21N

Molar mass = 21 12 + 21 1 + 14 = 287 g mol-1

Answer: 287

Keep practising — Amines

Ques. 2JEE Main 2024, 5 April (Morning Shift)

9.3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product 'P'. The mass of product 'P' obtained is 26.4 g. The percentage yield is %.

Ques. 3JEE Main 2024, 5 April (Evening Shift)

X g of ethanamine was subjected to reaction with NaNO2/HCl followed by hydrolysis to liberate N2 and HCl. The HCl generated was completely neutralised by 0.2 moles of NaOH. X is g.

Ques. 4JEE Main 2024, 4 April (Morning Shift)

Xg of ethylamine is subjected to reaction with NaNO2/HCl followed by water; evolved dinitrogen gas which occupied 2.24 L volume at STP. X is 10-1 g.

Ques. 5JEE Main 2024, 4 April (Evening Shift)

From 6.55 g of aniline, the maximum amount of acetanilide that can be prepared will be 10-1 g.

Ques. 6JEE Main 2024, 4 April (Evening Shift)

Phthalimide is made to undergo following sequence of reactions. [figure] Total number of bonds present in product 'P' is/are .

Ques. 7JEE Main 2024, 1 February (Morning Shift)

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 8JEE Main 2024, 1 February (Morning Shift)

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Both Statement I and Statement II are correct
  2. Statement I is incorrect but Statement II is correct
  3. Statement I is correct but Statement II is incorrect
  4. Both Statement I and Statement II are incorrect
Ques. 9JEE Main 2024, 1 February (Evening Shift)

Number of compounds which give reaction with Hinsberg's reagent is . [figure]

Ques. 10JEE Main 2024, 31 January (Evening Shift)

The azo-dye (Y) formed in the following reactions is Sulphanilic acid + NaNO2 + CH3COOH X. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11JEE Main 2024, 31 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

  1. Both statement I and statement II are true
  2. Statement I is true but statement II is false
  3. Statement I is false but statement II is true
  4. Both statement I and statement II are false

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