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Amines

JEE Main 2024 (Online) 5th April Morning ShiftNumericalEasy📈 Topic in 46% papers+4
Ques. 1JEE 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 %.

Answer

80

Solution

[figure]

∵ –NH2 strongly activates o-, p-positions ⇒ 2,4,6-tribromoaniline

Molar mass: aniline = 93 g mol-1

P (C6H4NBr3) = 330 g mol-1

Moles of aniline = 9.393 = 0.1 mol ⇒ theoretical P = 0.1 × 330 = 33 g

% yield = 26.433 100 = 80%

Answer: 80

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Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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. 6JEE 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. 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. 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. 8JEE Main 2024, 1 February (Evening Shift)

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

Ques. 9JEE 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. 10JEE 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
Ques. 11JEE Main 2024, 31 January (Evening Shift)

A compound (x) with molar mass 108 g mol-1 undergoes acetylation to give product with molar mass 192 g mol-1. The number of amino groups in the compound (x) is .

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