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Amines

NEET 2016 (Phase 2)MCQEasy📈 Topic in 38% papers+4−1
Ques. 1NEET 2016 (Phase 2)

A given nitrogen-containing aromatic compound 'A' reacts with Sn/HCl, followed by HNO2 to give an unstable compound 'B'. 'B', on treatment with phenol, forms a beautiful coloured compound 'C' with the molecular formula C12H10N2O. The structure of compound 'A' is

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

Answer

(2) [figure]

Solution

'C' ( C12H10N2O) is the orange azo dye p-hydroxyazobenzene, formed by coupling of benzenediazonium chloride with phenol.

'B' is benzenediazonium chloride (unstable), formed from aniline by diazotisation.

Aniline is formed by reduction of nitrobenzene with Sn/HCl.

C6H5NO2 Sn/HCl C6H5NH2 NaNO2/HCl, 273-278 K C6H5N2+Cl-

C6H5N2+Cl- + C6H5OH OH- p-HO-C6H4-N=N-C6H5 (C12H10N2O)

'A' is nitrobenzene.

Answer: (2)

Keep practising — Amines

Ques. 2AIPMT 2015

The following reaction [figure] is known by the name

  1. Perkin's reaction
  2. Acetylation reaction
  3. Schotten-Baumann reaction
  4. Friedel-Craft's reaction
Ques. 3AIPMT 2015

Method by which aniline cannot be prepared is

  1. degradation of benzamide with bromine in alkaline solution
  2. reduction of nitrobenzene with H2/Pd in ethanol
  3. potassium salt of phthalimide treated with chlorobenzene followed by hydrolysis with aqueous NaOH solution
  4. hydrolysis of phenylisocyanide with acidic solution.
Ques. 4AIPMT 2015 (Cancelled)

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

  1. azobenzene
  2. aniline
  3. p-aminophenol
  4. azoxybenzene.
Ques. 5AIPMT 2014

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

  1. [figure]
  2. [figure]
  3. [figure]
  4. [figure]
Ques. 6AIPMT 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. 7NEET 2013

In the reaction [figure] A is

  1. H3PO2 and H2O
  2. H+/H2O
  3. HgSO4/H2SO4
  4. Cu2Cl2
Ques. 8NEET 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. 9NEET 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. 10AIPMT 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. 11AIPMT 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

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