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Hydrocarbons

Multiple Choice Questions

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

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

5,6-dimethylhept-2-ene

The longest chain contains 7C-atom, so the root word is hept and suffix -ene is added for double bond along with its position. Since, two methyl groups are also present at 5 and 6 positions, so the correct IUPAC name of the compound is 5,6-dimethylhept-2-ene.