Which of the following is most basic in nature? from Chemistry A

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 Multiple Choice QuestionsMultiple Choice Questions

661.

Which of the following compounds gives carbylamine test?

  • N-methyl-o-methyl aniline

  • N, N-dimethyl aniline

  • 2, 4-diethyl aniline

  • p-methyl-N-methyl benzylamine


662.

Which of the following is 3° amine?

  • 1-methylcyclohexylamine

  • Triethyl amine

  • Tert-butylamine

  • N-methyl aniline


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663.

Which of the following is most basic in nature?

  • NH3

  • CH3NH2

  • (CH3)2NH

  • C6H5N(CH3)2


C.

(CH3)2NH

Basicity of amines depends upon the availability of lone pair of nitrogen for donation. Electron mreleasing group like -CH3 increases the basicity of amines by increasing electron density over nitrogen, which facilitate the donation of lone pair of electrons.

Electron withdrawing groups like -Ph group withdraws electrons and thus, make amines less basic by decreasing electron density over nitrogen. Hence, the order of basic nature of the given amines is

(CH3)2NH > C6H5N(CH3)2 > CH3NH2 > NH3

Thus, (CH3)2NH is most basic.


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664.

In which of the following, NH3 is not used?

  • Tollen's reagent

  • Nessler's reagent

  • Group reagent for the analysis of IV group basic radicals

  • Group reagent for the analysis of III group basic radicals


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665.

Amine that cannot be prepared by Gabriel phthalimide synthesis is

  • aniline

  • benzylamine

  • methylamine

  • iso-butylamine


666.

Lactose is made of

  • α-D-glucose only

  • α-D-glucose and β-D-glucose

  • α-D-galactose and β-D-glucose

  • β-D-galactose and β-D-glucose


667.

Gabriel phthalimide reaction is used for the preparation of

  • primary aromatic amines

  • secondary amines

  • primary aliphatic amines

  • tertiary amines


668.

During, acetylation of amines, what is replaced by acetyl group ?

  • Hydrogen atom attached to nitrogen atom

  • One or more hydrogen atoms attached to carbon atom

  • One or more hydrogen atoms attached to nitrogen atom

  • Hydrogen atoms attached to either carbon atom or nitrogen atom


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669.

Electrolytic reduction of nitrobenzene in weakly acidic medium gives

  • aniline

  • nitrosobenzene

  • N-phenylhydroxylamine

  • p-hydroxyaniline


670.

RCON3heatRNCOH2ORNH2This reaction is known as:

  • Schmidt reaction

  • Wurtz reaction

  • Curtius reaction

  • Gabriel phthalimide reaction


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