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 Multiple Choice QuestionsMultiple Choice Questions

11.

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of,

  • two ethylenic double bonds

  • a vinyl group

  • an isopropyl group 

  • an isopropyl group 

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12.

Silver Mirror test is given by which one of the following compounds?

  • Acetaldehyde

  • Acetone

  • Formaldehyde

  • Formaldehyde

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13.

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is 

  • Propene

  • 1-butene

  • 2-butene

  • 2-butene

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14.

Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolourize the colour of bromine?

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15.

The correct sequence of reagents for the following conversion will be

  • [Ag(NH3)2]+ OH, H+/CH3OH, CH3MgBr

  • CH3MgBr, H+/CH3OH, [Ag(NH3)2]+ OH

  • CH3MgBr, [Ag(NH3)2]+ OH, H+/CH3OH

  • CH3MgBr, [Ag(NH3)2]+ OH, H+/CH3OH

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16.

The major product obtained in the following reaction is

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17.

In Cannizzaro reaction given below  the slowest step is

  • The attack of  at the carboxyl group

  • The transfer of hydride to the carbonyl group

  • The abstraction of proton from the carboxylic group

  • The abstraction of proton from the carboxylic group

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18.

In the following sequence of reactions, the alkene affords the compound ‘B’
CH subscript 3 CH space equals space CHCH subscript 3 space rightwards arrow with straight O subscript 3 on top space straight A space rightwards arrow from Zn to straight H subscript 2 straight O of space straight B
The compound B is

  • CH3CH2CHO

  • CH3COCH3

  • CH3CH2COCH3

  • CH3CH2COCH3

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19.

The compound formed as a result of oxidation of ethylbenzene by KMnO4 is

  • benzophenone

  • acetophenone

  • benzoic acid

  • benzoic acid

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20.

The increasing order of the rate of HCN addition to compounds A – D is
(A) HCHO
(B) CH3COCH3
(C) PhCOCH3
(D) PhCOPh

  • A < B < C < D

  • D < B < C < A

  • D < C < B < A

  • D < C < B < A

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