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 Multiple Choice QuestionsMultiple Choice Questions

621.

Ethylamine (C2H5NH2) can be obtained from N-ethipthalimide on treatment with

  • CaH2

  • H2O

  • NaBH4

  • NH2NH2


622.

Aniline dissolved in dilute HCl is reacted with sodium nitrite at 0ºC. This solution was added dropwise to a solution containing equimolar mixture of aniline and phenol in dil. HCl. The structure of the major product is


623.

The major product ‘Y’ in the following reaction is :


624.

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


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625.

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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626.

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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627.

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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628.

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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629.

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

  • p-aminophenol

  • azoxybenzene

  • azobenzene

  • aniline

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630.

In the following reaction, the product (A) is 



D.


The above reaction is coupling reaction of aniline with the diazonium salt to give azo benzene compound. This is coupling reaction takes place at para position to -NH2 group of benzene.
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