In the carbylamine reaction, R-X is converted to R-Y via the inte

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 Multiple Choice QuestionsMultiple Choice Questions

561.

Mark the correct statement.

  • Methylamine is slightly acidic

  • Methylamine is less basic than NH3

  • Methylamine is stronger base than NH3

  • Methylamine forms salt with alkalies


562.

Which among the following represents an amide?


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563.

In the carbylamine reaction, R-X is converted to R-Y via the intermediate Z. R-X, R-Y and Z, respectively, are

  • RNH2, RNC, Carbene

  • RNH2, RNC, nitrene

  • RNC, RNH2, carbene

  • ROH, RNC, nitrene


A.

RNH2, RNC, Carbene

In carbylamine reaction, a primary amine (aliphatic or aromatic) is warmed with
chloroform and alcoholic KOH. It forms an isocyanide or carbylamine having extremely offensive smell. In this reaction intermediate carbene is formed


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564.

Which one of the following is the strongest base ?

  • 2,4,6-trinitroaniline

  • 2,4,6-trinitro-N,N-dimethyl aniline

  • N, N-dimethyl aniline

  • Anline


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565.

Hinsberg's reagent is

  • benzene sulphonyl chloride

  • benzene sulphonic acid

  • phenyl isocyanide

  • benzene sulphonamide


566.

The given reaction is called as

  • Schmidt rearrangement

  • Curtius rearrangement

  • Hofmann rearrangement

  • Lossen rearrangement


567.

Correct basicity of the following compounds are

I. Aniline

II. Pyridine

III. Pyrrole

IV. Guanidine

  • I >II >III >IV

  • III >I >II >IV

  • IV >II >I >III

  • II >IV>III >I


568.

One amine is more basic than ammonia and the other is less basic than ammonia. The two amines are respectively

  • N-methyl ethanamine and N, N-dimethyl ethanamine

  • aniline and N-methyl aniline

  • N-methyl aniline and aniline

  • N, N-dimethyl aniline and benzenamine


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569.

One of the isomer of C4H11N is optically active. It must be a

  • primary amine

  • secondary amine

  • tertiary amine

  • all isomers are optically inactive


570.

Which of the following compounds cannot be identified by carbylamine test?

  • CHCl3

  • C6H5-NH-C6H5

  • C6H5NH2

  • CH3CH2NH2


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