The correct order of increasing basic nature of the following bas

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 Multiple Choice QuestionsMultiple Choice Questions

521.

Choose the incorrect statement.

  • Primary amines show intermolecular hydrogen bonds

  • Tert-butylamine is a primary amine

  • Tertiary amines do not show intermolecular hydrogen bonds

  • Isopropylamine is a secondary amine


522.

Amine that cannot be prepared by Gabriel phthalimide synthesis is

  • aniline

  • benzylamine

  • methylamine

  • iso-butylamine


523.

Which of the following is the least basic amine?

  • Ethylamine

  • Diethylamine

  • Aniline

  • Benzylamine


524.

The reaction of CHCl3 and alcoholic KOH with p-toluidine gives


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525.

The correct order of increasing basic nature of the following bases is

  • 2 < 5 < 1 < 3 < 4

  • 5 < 2 < 1 < 3 < 4

  • 2 < 5 < 1 < 4 < 3

  • 5 < 2 < 1 < 4 < 3


A.

2 < 5 < 1 < 3 < 4

-OCH3 is strongest electron releasing group ( +M effect) which opposes most the dispersion of lone pair of electron of nitrogen into the ring. Thus -OCH, being at para- position imparts highest basicity. NO, being at meta- position stabilises the electron pair of nitrogen only by -I effect. While NO, being present at paraposition due to -M effect and -I effect stabilises the lone pair of electron of nitrogen, most and impart least basicity.

  


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526.

Choose the amide which on reduction with LiAlH4 yields a secondary amine

  • ethanamide

  • N-methylethanamide

  • N, N-dimethylethanamide

  • phenylmethanamide


527.

Arrange the following amines in the decreasing order of their basic strength. Aniline (I), Benzylamine (II), p-toluidine (III)

  • I > II > III

  • II > III > I

  • III > II > I

  • II > I > III


528.

Which one of the following compounds will dissolve in an alkali solution after it has undergone reaction with Hinsberg reagent?

  • CH3NH2

  • (CH3)3N

  • (C2H5)2NH

  • C6H5NHC6H5


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529.

Identify the product in the following sequence 3,4,5 tribromoaniline (2) H3PO2(1) diazorization ?

  • 3, 4, 5-tribromobenzene

  • 1, 2, 3-tribromobenzene

  • 2, 4, 6-tribromobenzene

  • 3, 4, 5-tribromonitrobenzene


530.

Among the amines 

(A) C6H5NH2

(B) CH3NH2

(C) (CH3)3N

(D) (CH3)2NH

  • A < B < D <C

  • D < C < B <A

  • A > B > C >D

  • B < C < D <A


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