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Amines

JEE Main 2024 (Online) 30th January Evening ShiftMCQEasy📈 Topic in 24% papers+4−1
Ques. 1JEE 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]

Answer

(2) [figure]

Solution

[figure]

∵ Sn/HCl reduces –NO2 to –NH2 ⇒ A = aniline

A NaNO2, HCl, 273-278 K benzenediazonium chloride (diazotisation)

[figure]

∵ –OH is o/p-directing; the bulky ArN2 couples at the less hindered para position ⇒ B = p-hydroxyazobenzene (orange dye)

(A): –N=N– ortho to –OH ⇒ (A) is wrong

(C), (D): no –N=N– group ⇒ (C), (D) are wrong

Answer: (2)

Keep practising — Amines

Ques. 2JEE 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. 3JEE 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. 4JEE 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. 5JEE 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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