An alkyl halide reacts with alcoholic ammonia in a sealed tube, t

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 Multiple Choice QuestionsMultiple Choice Questions

571.

Acetamide and ethylamine can be distinguished ,by reacting with

  • Br2 water

  • acidic KMnO4

  • aq HCl and heat

  • aq NaOH and heat


572.

The basicity of aniline is less than that of cyclohexylamine. This is due to :

  • +R-effect of-NH2 group

  • -I effect of -NH2 group

  • -R effect of-NH2 group

  • hyperconjugation effect


573.

Which of the following would undergo Hofmann reaction to give a primary amine?

  • R-CO-Cl

  • RCONHCH3

  • RCONH2

  • RCOOR


574.

Hofmann's bromamide reaction is to convert

  • acid to alcohol

  • alcohol to acid

  • amide to amine

  • amine to amide


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575.

Amines behave as

  • Lewis acid

  • Lewis base

  • aprotic acid

  • neutral compound


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576.

An alkyl halide reacts with alcoholic ammonia in a sealed tube, the product formed will be

  • a primary amine

  • a secondary amine

  • a tertiary amine

  • a mixture of all the three


D.

a mixture of all the three

When an alkyl hahde reacts with alcoholic ammonia in a sealed tube then a mixture of primary, secondary and tertiary amine is formed.

RX + NH3 → RNH2pri-amine + HX

RNH2 + XR → R2NHsec-amine + HX

R2NH2 + XR → R3Nter-amine + HX


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577.

Arrange the following in the increasing order of their basic strengths CH3NH2, (CH3)2NH, (CH3)N, NH3

  • NH3 < (CH3)N < (CH3)2NH < CH3NH2

  • NH3 <  (CH3)N < CH3NH< (CH3)2NH

  • (CH3)N < NH< CH3NH< (CH3)2NH

  • CH3NH< (CH3)2NH < (CH3)N < NH3


578.

Which one of the following has the most nucleophilic nitrogen?


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579.

The correct sequence of reactions to convert p-nitrophenol into quinol involves

  • reduction, diazotization and hydrolysis

  • hydrolysis, diazotization and reduction

  • hydrolysis, reduction and diazotization

  • diazotization, reduction and hydrolysis


580.

CH3CH2Br aq KOH CH3CH2OH KMnO4/H+B NH3 C alkaliBr2 D, 'D' is

  • CH2Br

  • CH3CONH2

  • CH3NH2

  • CHBr3


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