Aromatization
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Q. 44. The correct order of stability of given carbocation is: 1. NO_2-CH_2-CH_2^+ 2. NH_2-CH_2-CH_2^+ 3. CH_3-O-CH_2^+ 4. HO-CH_2^+ 5. NH_2-CH_2^+ 6. NO_2-CH_2^+ 7. CH_3O-CH_2-CH_2^+ 1.7>3>2>4>5>1>6 2. 5>3>4>2>6>1>7 3. 5>4>3>2>7>1>6 4. 6>1>7>3>2>5>4
Q.
n- Octane in the presence of Cr2O3/Al2O3 at 873K changes to
O-xylene
1, 2-Dimethylcyclohexane
1, 2 - Dimethylcyclohex-1-ene
1, 2- Dimethylcyclohexa-1, 3-diene
Q. Name the hydrocarbon which when heated to a temperature of about 773 K under high pressure in the presence of Cr2O3/Al2O3 catalyst gives benzene.
- n-pentane
- n-hexane
- n-pentane
- n-octane
Q.
n - hexane and n - heptane, when passed through Cr2O3 supported over alumina at 6000 C respectively give
Benzene and heptane
Heptane and toluene
Phenol and benzene
Benzene and toluene
Q. The product obtained when n-heptane is heated to a temperature of about 773 K under high pressure in the presence of Cr2O3/Al2O3 catalyst is:
- 1, 2-dimethylbenzene
- Ethylbenzene
- Benzene
- Toluene
Q. Name the hydrocarbon which when heated to a temperature of about 773 K under high pressure in the presence of Cr2O3/Al2O3 catalyst gives benzene.
- n-pentane
- n-hexane
- n-pentane
- n-octane
Q.
n - hexane and n - heptane, when passed through Cr2O3 supported over alumina at 6000 C respectively give
Benzene and heptane
Heptane and toluene
Phenol and benzene
Benzene and toluene
Q. Which of the following compounds have stable enol form?
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1030723/original_oa.JPG)
- (a) only
- (b) only
- (a) and (d) only
- (d) only
Q. Why is cyclobutadiene carbanion is anti-aromatic?
Q. n-heptane when heated to a temperature of about 773 K under high pressure in the presence of Cr2O3/Al2O3 catalyst gives -
- Ethylbenzene
- 1, 2-dimethylbenzene
- Benzene
- Methylbenzene(Toluene)
Q. Convert Chlorobutane to butane-2, 3-diol