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Amines

JEE Main 2024 (Online) 31st January Evening ShiftMCQEasy📈 Topic in 46% papers+4−1
Ques. 1JEE 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

Answer

(1) Both statement I and statement II are true

Solution

[figure]

Statement I: sulphanilic acid has both N and S ⇒ Lassaigne's extract contains NaSCN

⇒ Fe3+ + SCN- [Fe(SCN)]2+ (blood red) ∴ Statement I is true

Statement II: - NH2 (Lewis base) + AlCl3 (Lewis acid) ⇒ salt C6H5 NH2 AlCl3

∵ N now carries a positive charge ⇒ strongly deactivating ⇒ no Friedel–Crafts reaction ∴ Statement II is true

Answer: (1)

Keep practising — Amines

Ques. 2JEE 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 .

Ques. 3JEE Main 2024, 30 January (Morning Shift)

The final product A, formed in the following multistep reaction sequence is : [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 4JEE Main 2024, 30 January (Morning Shift)

Following is a confirmatory test for aromatic primary amines. Identify reagent (A) and (B). [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 5JEE Main 2024, 30 January (Evening Shift)

The products A and B formed in the following reaction scheme are respectively [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6JEE Main 2024, 29 January (Morning Shift)

The arenium ion which is not involved in the bromination of Aniline is .

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 7JEE Main 2024, 29 January (Evening Shift)

The product A formed in the following reaction is [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 8JEE Main 2024, 27 January (Evening Shift)

Identify B formed in the reaction. Cl-(CH2)4-Cl excess NH3 A NaOH B + H2O + NaCl

  1. [figure]
  2. [figure]
  3. -Cl +NH3-(CH2)4- +NH3Cl-
  4. H2N-(CH2)4-NH2
Ques. 9JEE Main 2024, 27 January (Evening Shift)

9.3 g of aniline is subjected to reaction with excess of acetic anhydride to prepare acetanilide. The mass of acetanilide produced if the reaction is 100% completed is 10-1 g. (Given molar mass in g mol-1 N : 14, O : 16, C : 12, H : 1)

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