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 Multiple Choice QuestionsMultiple Choice Questions

491.

The product (Z) of the following reaction is:

       


492.

What is the product in the following reaction?

  • Benzoquionone

  • Cyclohexane-1-one

  • Benzoic sulphate

  • Benzoric acid


493.

Which one of the following has highest boiling point?

  • H3CCH2CH2CH2Cl

  • (H3C)2CHCH2Cl

  • (H3C)3CCl

  • H3CCH2CHClCH3


494.

The product Z of the following reaction is H3CC≡CH 2HBr Z.

  • H3CCH2CHBr2

  • H3CCBr2CH3

  • H3CCHBrCH2Br

  • BrCH2CH2CH2Br


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495.

Identify X and Y in the following reaction sequence

X Zn Y Zn-H2OO3 (CH3)2CO + CH2O

  •  

    X Y
    (CH3)2CHBrCH3 CH3CH=CHCH3
  • X Y
    (CH3)2CHCH2Br CH3CH=CHCH3
  • X Y
    (CH3)2CBrCH2Br (CH3)2C=CH2
  • X Y
    (CH3)2CHCHBr2 (CH3)2C=CH2

496.

Oxidation of cyclohexene in presence of acidic potassium permaganate leads to

  • glutaric acid

  • adipic acid

  • pimelic acid

  • succinic acid


497.

Cyclopentadienyl anion is

  • benzenoid and aromatic

  • non-benzenoid and aromatic

  • non-benzenoid and non-aromatic

  • non-benzenoid and anti- aromatic


498.

The reactivity of alkyl bromides.

 

Towards iodide ion in dry acetone decrease in the order

  • V > I > II > III

  • I > IV> II> III

  • III> II> I> I

  • III > II > IV > I


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499.

Optically active CH3—CH2—CHOH—CH3 was found to have lost its optical activity after standing in water containing a few drops of acids, mainly due to the formation of 

  • CH3—CH2—CH=CH2

  • CH3—CH=CH—CH3

  • CH3—CH(CH3)—CH2—OH

  • CH3—CH2—CH2—CH2—OH


B.

CH3—CH=CH—CH3

CH3—CH2—CHOH—CH3 (Dehydration)Few drops of acid CH3—CH=CH—CH3.

The above optically active compound undergo dehydration with few drops of acid and form stable alkene through the formation of stable carbocation.


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500.

Which one of the following alkenes when treated with HCl yields majority an anti Maxkovnikov product?

  • CH3O-CH=CH2

  • Cl-CH=CH2

  • F3C-CH=CH2

  • H2N-CH=CH2


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