A compound possessing optical isomerism provided it has the molecular formula C7H16, would be:

1. 2,3-Dimethyl pentane 2. 2,2-Dimethyl butane
3. 2-Methyl hexane 4. None of the above
Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 72%
From NCERT
AIPMT - 2001
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The compound that has least hindered rotation around carbon-carbon bond is-

1. Ethane 2. Ethylene
3. Acetylene 4. Hexachloroethane
Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 71%
From NCERT
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