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Amines

AIPMT 2014MCQEasy📈 Topic in 38% papers+4−1
Ques. 1AIPMT 2014

In the following reaction, the product (A) is [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]

Answer

(4) [figure]

Solution

Benzenediazonium chloride is a weak electrophile; it couples with the activated ring of aniline at the para position (azo coupling, electrophilic substitution).

As per NCERT, benzenediazonium chloride reacts with aniline in mildly acidic medium to give p-aminoazobenzene, a yellow dye:

C6H5N2+Cl- + C6H5NH2 H+ C6H5-N=N-C6H4-NH2 + HCl

∴ (A) is p-aminoazobenzene, i.e. the -NH2 group para to the -N=N- link.

Answer: (4)

Keep practising — Amines

Ques. 2AIPMT 2014

Which of the following will be most stable diazonium salt RN2+X-?

  1. CH3N2+X-
  2. C6H5N2+X-
  3. CH3CH2N2+X-
  4. C6H5CH2N2+X-
Ques. 3NEET 2013

In the reaction [figure] A is

  1. H3PO2 and H2O
  2. H+/H2O
  3. HgSO4/H2SO4
  4. Cu2Cl2
Ques. 4NEET 2013 (Karnataka)

On hydrolysis of a "compound", two compounds are obtained. One of which on treatment with sodium nitrite and hydrochloric acid gives a product which does not respond to iodoform test. The second one reduces Tollens reagent and Fehling's solution. The "compound" is

  1. CH3CH2CH2NC
  2. CH3CH2CH2CN
  3. CH3CH2CH2ON=O
  4. CH3CH2CH2CON(CH3)2
Ques. 5NEET 2013 (Karnataka)

Some reactions of amines are given. Which one is not correct?

  1. [figure]
  2. CH3CH2NH2 + HNO2 CH3CH2OH + N2
  3. CH3NH2 + C6H5SO2Cl CH3NHSO2C6H5
  4. (CH3)2NH + NaNO2 + HCl (CH3)2N-N=O
Ques. 6AIPMT 2012 (Mains)

An organic compound (C3H9N) (A), when treated with nitrous acid, gave an alcohol and N2 gas was evolved. (A) on warming with CHCl3 and caustic potash gave (C) which on reduction gave isopropylmethylamine. Predict the structure of (A)

  1. [figure]
  2. CH3CH2-NH-CH3
  3. [figure]
  4. CH3CH2CH2-NH2
Ques. 7AIPMT 2011 (Mains)

An organic compound A on treatment with NH3 gives B, which on heating gives C. C when treated with Br2 in the presence of KOH produces ethyl amine. Compound A is

  1. CH3COOH
  2. CH3CH2CH2COOH
  3. [figure]
  4. CH3CH2COOH
Ques. 8AIPMT 2011 (Mains)

Which of the following compounds is most basic?

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 9AIPMT 2011 (Prelims)

In a set of reactions m-bromobenzoic acid gave a product D. Identify the product D. [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 10AIPMT 2011 (Prelims)

What is the product obtained in the following reaction? [figure]

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 11AIPMT 2010 (Mains)

Match the compounds given in List-I with their characteristic reactions given in List-II. Select the correct option.

  1. A-(ii), B-(i), C-(iv), D-(iii)
  2. A-(iii), B-(ii), C-(i), D-(iv)
  3. A-(ii), B-(iii), C-(i), D-(iv)
  4. A-(iv), B-(ii), C-(iii), D-(i)

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