Important Questions of Hydrocarbons Chemistry | Zigya

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11.

The major products obtained during ozonolysis of 2, 3-dimethyl-1-butene and subsequent reductions with Zn and H2O are

  • methanoic acid and 2-methyl-2-butanone

  • methanal and 3-methyl-2-butanone

  • methanol and 2, 2 -dimethyl-3-butanone

  • methanoic acid and 2-methyl-3-butanone


12.

1,4-dimethylbenzene on heating with anhydrous AlCl3 and HCl produces

  • 1, 2-dimethylbenzene

  • 1, 3-dimethylbenzene

  • 1,2, 3-trimethylbenzene

  • ethylbenzene


13.

Best reagent for nuclear iodination of aromatic compounds is

  • KI/CH3COCH3

  • I2/CH3CN

  • KI/ CH3COOH

  • I2/ HNO3


14.

The total number of aromatic species generated in the following reactions is

  • zero

  • 2

  • 3

  • 4


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15.

The IUPAC name of the following molecule is

       

  • 5,6-dimethylhept-2-ene

  • 2,3-dimethylhept-5-ene

  • 5,6-dimethylhept-3-ene

  • 5-iso-propylhex-2-ene


16.

The 4th higher homologue of ethane is

  • butane

  • pentane

  • hexane

  • heptane


17.

The order of decreasing ease of abstraction of hydrogen atoms in the following molecules

  • Ha > Hb > Hc

  • H> H > Hb

  • Hb > H> Hc

  • Hc > Hb > Ha


18.

Reaction of benzene with Me3CCOCl in the presence of anhydrous AlCl3 gives


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19.

Treatment of  with NaNH2/ liq.NH3 gives


20.

The best method for the preparation of 2, 2-dimethylbutane is via the reaction of

  • Me3CBr and MeCH2Br in Na/ether

  • (Me3C)2CuLi and MeCH2Br

  • (MeCH2)2CuLi and Me3CBr

  • Me3CMgI and MeCH2I


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