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 Multiple Choice QuestionsMultiple Choice Questions

701.

Iodoform gives a precipitate with AgNO3 on heating but chloroform does not because

  • C - I bond in iodoform is weak and C - Cl bond in chloroform is strong

  • chloroform is covalent

  • iodoform is ionic

  • None of the above


702.

Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

  • Benzyl chloride

  • Ethyl chloride

  • Chlorobenzene

  • lsopropyl chloride


703.

Which of the following organic halogen compounds undergoes hydrolysis with aqueous NaOH predominantly by Sy1 mechanism?

  • Ethyl iodide

  • Methyl chloride

  • lsopropyl chloride

  • Benzyl chloride


704.

Under basic condition which one suffers elimination the most?

  • (CH3)3CCI

  • (CH3)2CHCH2CI

  • CH3CH2CHCICH3

  • CH3CH2CH2CH2CI


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705.

Strongest nucleophile is

  • RNH2

  • ROH

  • C6H5O-

  • CH3O-


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706.

Which of the following compound gives iodoform test?

  • CH3CN

  • CH3OH

  • CH3COCH3

  • C6H5OH


C.

CH3COCH3

Compounds containing CH3CO group give the iodoform test. The reaction is

CH3CO-CH3 + 3I2 +NaOH CHI3 + HCOONa + H2O

                                           iodoform (yellow ppt)

Hence, only acetone gives the iodoform test.


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707.

What happens if CCl4 is treated with AgNO3 ?

  • A white ppt. of AgCl will form

  • NO2 will be evolved

  • CCl4 will dissolve in AgNO3

  • Nothing will happen


708.

Identify the end product:


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709.

An asymmetric carbon atom is which

  • attached three atoms or groups are different

  • attached all the atoms or groups are different

  • attached two atoms or groups are different

  • attached all the atoms or groups are the same


710.

Which of the following isomeric heptanes can yield seven different monochlorinated products upon free radical chlorination?

  • 3-methyl hexane

  • 2, 2-dimethyl pentane

  • 2-methyl hexane

  • 2, 3-dimethyl pentane


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