Important Questions of Amines Chemistry | Zigya

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201.

Which of the following is NOT a correct method if the preparation of benzylamine from cyanobenzene ?

  • H2/ Ni

  • (i) LiAlH4

    (ii) H3O+

  • (i) SnCl2 + HCl(gas)

    (ii) NaBH4

  • (i) HCl/H2

    (ii) NaBH4


202.

The correct statement regarding the basicity of arylamines is

  • Arylamines are generally more basic than alkylamines because the nitrogen lone pair electrons are not delocalized by interaction with the aromatic ring pi-electron system

  • Arylamines are generally more basic than alkylamines, because of aryl group

  • Arylamines are generally more basic than alkylamines because the nitrogen atom in arylamines is sp-hydridized.

  • Arylamines are generally more basic than alkylamines because the nitrogen atom in arylamines is sp-hydridized.

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203.

In the reaction,

straight H minus straight C identical to CH space rightwards arrow from left parenthesis ii right parenthesis space CH subscript 3 CH subscript 2 Br to left parenthesis straight i right parenthesis space NaNH subscript 2 divided by liq. NH subscript 3 of space straight X
space space space space space space space space space space space space space space space space space space straight X space rightwards arrow from left parenthesis ii right parenthesis space CH subscript 3 CH subscript 2 Br to left parenthesis straight i right parenthesis NaNH subscript 2 divided by liq. NH subscript 3 of space straight Y
X and Y are

  • X=2-butyne; Y= 3-hexyne

  • X=2-butyne;Y=2-hexyne

  • X=1-butyne ;Y = 2-hexyne

  • X=1-butyne ;Y = 2-hexyne

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204.

Consider the nitration of benzene using mixed conc. H2SO4 and HNO3. If a large amount of KHSO4 is added to the mixture, the rate of nitration will be

  • slower

  • uncharge

  • doubled

  • doubled

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205.

The product formed by the reaction of an aldehyde with a primary amine is

  • Ketone

  • Carboxylic acid

  • Aromatic acid

  • Aromatic acid

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206.

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

  • p-aminophenol

  • azoxybenzene

  • azobenzene

  • aniline

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207.

In the following reaction, the product (A) is 


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208.

Which of the following will most stable diazonium salt RN2+X-?

  • CH3N2+X-

  • C6H5N2+X-

  • CH3CH2N2+X-

  • CH3CH2N2+X-

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209.

Nitrobenzene on reaction with conc. HNO3/H2SO4 at 80-1000C forms which one of the following products?

  • 1,2-dinitrobenzene

  • 1,3- dinitrobenzene

  • 1,4-dinitrobenzene

  • 1,4-dinitrobenzene

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210.

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

  • -Cidentical toN

  • -SO3H

  • -COOH

  • -COOH

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