Compounds Containing Nitrogen

1

Presence of a nitro group in a benzene ring

  1. deactivates the ring towards nucleophilic substitution
  2. activates the ring towards electrophilic substitution
  3. renders the ring basic
  4. deactivates the ring towards electrophilic substitution
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2

When primary amine reacts with chloroform in ethanoic KOH then the product is

  1. an alcohol
  2. an isocyanide
  3. a cyanide
  4. an aldehyde
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3

The correct order of increasing basic nature for the bases NH3, CH3NH2 and (CH3)2NH is

  1. CH3NH2 < (CH3)2NH < NH3
  2. CH3NH2 < NH3 < (CH3)2NH
  3. (CH3)2NH < NH3 < CH3NH2
  4. NH3 < CH3NH2 < (CH3)2NH
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4

Which one of the following methods is neither meant for the synthesis nor for separation of amines?

  1. Wurtz reaction
  2. Curtius reaction
  3. Hinsberg method
  4. Hofmann method
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5

Which one of the following is the strongest base in aqueous solution?

  1. Dimethylamine
  2. Aniline
  3. Trimethylamine
  4. Methylamine
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