Which of the following will give carbylamine test? from Chemistr

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 Multiple Choice QuestionsMultiple Choice Questions

261.

Hinsberg reagent is :

  • C6H5SO3H

  • C6H5NO

  • C6H5SO2Cl

  • C6H5N2Cl


262.

Ethyl amine reacts with nitrous acid to form :

  • C2H5OH

  • C2H5OH , N2 , H2O

  • C2H5N2+Cl-

  • C2H5NHOH , NH3


263.

The reaction of chloroform with alcoholic KOH and p toluidine form :


264.

Which one of the following does not participate in the carbylamine reaction ?

  • KOH

  • Ethanol

  • Chloroform

  • Aniline


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265.

Alkyl halides react with Mg in dry ether to form :

  • magnesium halide

  • Grignard's reagent

  • alkene

  • alkyne


266.

If phthalic acid is treated with NH3 and then it is first heated weakly then strongly, the final product formed is


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267.

Which of the following will give carbylamine test?

  • CH3NH2

  • CH3NHCH3

  • CH3N(CH3)CH3

  • CH3CONH2


A.

CH3NH2

Carbylamine test is a test for the detection of primary amines. In this test, the analyte is heated with alcoholic potassium hydroxide and chloroform. If a primary amine is present, the isocyanide (carbylamine) is formed which are foul smelling substances.

CH3NH2 + CHCl3 + 3KOH  CH3CN  = C(offensive smell)  + 3KCl + 3H2O


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268.

Nitrobenzene (PhNO2Zn + NH4ClP ?

  • C6H5NH2

  • C6H5NHOH

  • C6H5-N=O

  • C6H6


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269.

PhCH2Cla.q. NaCl? Catalytic hydrogenation(U)

The final product (U) is:

  • C6H5CH2CH2NH2

  • C6H5CH2CONH2

  • C6H5CH2NH2

  • C6H5CH2NHCH3


270.

Among the following, the correct order of basicity is :

  • NH2- > OH- > RO- > RCOO-

  • NH2- > RO- > OH- > RCOO-

  • RCOO- > NH2- > RO- > OH-

  • RCOO- > RO- > NH2- > OH-


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