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 Multiple Choice QuestionsMultiple Choice Questions

11.

Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid,gives 

  • 2,4,6-trinitrobenzene

  • o-nitrophenol

  • p-nitrophenol

  • p-nitrophenol

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12.

The reaction of toluene with Cl2 in presence of FeCl3 gives predominantly

  • benzoyl chloride

  • benzyl chloride

  • o-and p-chlorotoluene

  • o-and p-chlorotoluene

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13.

In the following sequence of reactions, 

CH subscript 3 CH subscript 2 OH space rightwards arrow with space space space straight P space plus space straight I subscript 2 on top straight A space rightwards arrow from ether to Mg of straight B space rightwards arrow with HCHO on top space straight C space rightwards arrow with straight H subscript 2 straight O on top space straight D comma space then compound ‘D’ is

  • butanal

  • n-butyl alcohol

  • n-propyl alcohol

  • n-propyl alcohol

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14.

Fluorobenzene (C6H5F) can be synthesized in the laboratory

  •  by heating phenol with HF and KF

  • from aniline by diazotisation followed by heating the diazonium salt with HBF4

  • by direct fluorination of benzene with F2 gas

  • by direct fluorination of benzene with F2 gas

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15.

The structure of the compound that gives a tribromo derivative on treatment with bromine water is

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16.
The alkene formed as a major product in the above elimination reaction is
  • CH2 = CH2


B.

CH2 = CH2

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17.

The electrophile involved in the above reaction is
  • dichloromethyl cation (C+HCl )

  • dichlorocarbene ( :CCl2

  • trichloromethyl anion (C-Cl3 )

  • trichloromethyl anion (C-Cl3 )

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18.

Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 400 C gives predominantly

  • 3-bromobutene under kinetically controlled conditions

  • 1-bromo-2-butene under thermodymically controlled conditions

  • 3-bromobutene under thermodynamically controlled conditions

  • 3-bromobutene under thermodynamically controlled conditions

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19.

Acid catalyzed hydration of alkenes except ethene leads to the formation of

  • primary alcohol

  • secondary or tertiary alcohol

  • mixture of primary and secondary alcohols

  • mixture of primary and secondary alcohols

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20.

The reaction



is fastest when X is

  • Cl

  • NH2

  • OC2H5

  • OC2H5

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