In case of substituted aniline the group which decreases the basi

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 Multiple Choice QuestionsMultiple Choice Questions

501.

The correct IUPAC name of [Co(NH3)3(NO2)3] is

  • Triammine trinitro-N cobalt (III)

  • Triammine trinitro-N cobalt (II)

  • Triammine cobalt (III) nitrite

  • Triammine trinitro-N cobaltate (III)


502.

The replacement of diazonium group by fluorine is known as

  • Gattermann reaction

  • Sandmeyer reaction

  • Balz-Schiemann reaction

  • Etard reaction


503.

Identify the alkene that is produced in the following series of reactions

  


504.

An organic compound X having molecular formula C3H11N reacts with p-toluene sulphonyl chloride to form a compound Y that is soluble in aqueous KOH. Compound X is optically active and reacts with acety lchloride to form compound Z. Identify the compound Z

  • CH3CH2CH2CH2NHCOCH3

  • CH3CH2CH(CH3)NHCOCH3

  • CH3(CH3)CHCH2NHCOCH3


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505.

Diethyl amine when treated with nitrous acid yields

  • diethyl ammonium nitrite

  • ethyl alcohol

  • N-nitroso diethyl amine

  • triethyl ammonium nitrite


506.

The amine 'A' when treated with nitrous acid gives yellow oily substance. The amine A is

  • triethylamine

  • trimethylamine

  • aniline

  • methylphenylamine


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507.

In case of substituted aniline the group which decreases the basic strength is

  • -OCH3

  • -CH3

  • -NH2

  • -C6H5


D.

-C6H5

Electron releasing groups like -NH3, -OCH3, -CH3 increase electron density at N-atom hence, such substituents increase basic nature of aromatic amines. Electron-withdrawing groups like, -NO2, -SO3H, -COOH, -X, -C6H5 decrease electron density at N-atom thus, decreasing basic nature of aromatic amines.


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508.

Which of the following statement(s) is/are incorrect in case of Hofmann bromamide degradation?

  • Reaction is useful for decreasing length of carbon chain by one carbon atom

  • It gives tertiary amine

  • It gives primary amine

  • Aqueous or alco. KOH is used with bromine


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509.

The amine, which reacts with p-toluenesulphonyl chloride to give a clear solution, which on acidification gives insoluble compound is

  • C2H5NH2

  • (C2H5)2NH

  • (C2H5)3N

  • CH3NHC2H5


510.

Which one of the following can be prepared by Gabriel phthalimide synthesis?

  • Aniline

  • o- toluidine

  • Benzylamine

  • N-methylethanamine


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