RCONH2 + Br2 + KOH → AmineThis reaction is from Chemistry A

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 Multiple Choice QuestionsMultiple Choice Questions

131.

The compound which on reaction with aqueous HNO2 at low temperature produces an oily nitrosoamine is

  • methyl amine

  • ethyl amine

  • diethyl amine

  • aniline


132.

Amongst the following the most basic compund is

  • benzyl amine

  • aniline

  • acetanilide

  • p -nitroaniline


133.

Acetylene reacting with HCN in presence of Ba(CN)2 gives

  • vinyl cyanide

  • 1,1-dicyanoethane

  • 1,2-dicyanoethane

  • None of the above


134.

In dehydrolysing reaction, CH3CONH2 P2O5 CH3CN + H2O the hybridisation state of carbon is changed from

  • sp3 to sp2

  • sp to sp2

  • sp2 to sp

  • sp to sp3


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135.

The main compund obtained by fusion of sodium with aniline is

  • NaCN

  • NaN3

  • NaSCN

  • NaNO2


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136.

RCONH2 + Br2 + KOH → Amine

This reaction is

  • Carbyl amine reaction

  • Mustard oil reaction

  • Hofmann bromamde reaction

  • Cannizaro reaction


C.

Hofmann bromamde reaction

The conversion of a primary amide to a primary amine containing one carbon less than the original amide on heating with a mixture of Br2 in presence of NaOH is called Hofmann bromamide reaction.

R-CO-NH2 + Br2 + 4NaOH → R-NH2 + 2NaBr + Na2CO3 + 2H2O


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137.

Which of the following is strongest base?

  • C6H5NH2

  • p-NO2-C6H4NH2

  • m-NO2-C6H4NH2

  • C6H5CH2NH2


138.

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


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139.

Which among the following represents an amide?


140.

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


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