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 Multiple Choice QuestionsMultiple Choice Questions

771.

CH3CO2C2H5 on reaction with sodium ethoxide in ethanol gives A, which on heating in the presence of acid gives B. Compound B is

  • CH3COCH2COOH

  • CH3COCH3

  • CH2=C(OC2H5)2


772.

Assertion : Rate of hydrolysis of methyl chloride to methanol is higher in DMF than in water.

Reason : Hydrolysis of methyl chloride follows second order kinetics.

  • If both assertion and reason are true and reason is the correct explanation of assertion.

  • If both assertion and reason are true but reason is not the correct explanation of assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


773.

CH3-CH2-Cl alc. KOH A, the product is :

  • CH3CH2OK

  • CH3CHO

  • CH3CH2OCH2CH3

  • CH2=CH2


774.

Which ofthe following is involved in Sandmeyer's reaction ?

  • Ferrous salt

  • Diazonium salt

  • Ammonium salt

  • Cupromonium salt


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775.

The reaction :

C2H5OH  SOCl2 Pyridine C2H5Cl + SO2 + HCl is known as :

  • Kharasch effect

  • Williamson's synthesis

  • Darzen's procedure

  • Hunsdiecker reaction


776.

Among the following the dissociation constant is highest for

  • C6H5OH

  • C6H5CH2OH

  • CH3CCH

  • CH3NH3+Cl


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777.

Assertion : 2-bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product.

Reason : 1-butene is more stable than 2-butene.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


D.

If both assertion and reason are false.

2-bromobutane on reaction with sodium ethoxide in ethanol gives 2-butene as a major product.

This is according to Saytzeffs rule i.e. the predominant product is the most substituted alkene. 2-butene is more stable than 1-butene due to presence of large number of hyperconjugating structures in 2-butene.


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778.

Assertion : The major products formed by heating C6H5CH2OCH, with HI are C6H5CH2I and CH3OH.

Reason : Benzyl cation is more stable than methyl cation.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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779.

Assertion : Benzyl bromide when kept in acetone water it produces benzyl alcohol.

Reason : The reaction follows SN2 mechanism.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


780.

Assertion : Hydroxyketones are not directly used in Grignard reaction.

Reason : Grignard reagents react with hydroxyl group.

  • If both assertion and reason are true and the reason is the correct explanation of the assertion.

  • If both assertion and reason are true and the reason is not the correct explanation of the assertion.

  • If assertion is true but reason is false.

  • If both assertion and reason are false.


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