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%
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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%
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Arrange the following carbanions in order of their decreasing stability:

A. \(\mathrm{H}_3 \mathrm{C}-\mathrm{C} \equiv \mathrm{C}^{-}\)
B. \(\mathrm{H}-\mathrm{C} \equiv \mathrm{C}^{-}\)
C. \(\mathrm{H}_3 \mathrm{C}-\mathrm{\bar{C}H_2}\)

1. A>B>C

2. B>A>C

3. C>B>A

4. C>A>B

Subtopic:  Alkanes, Alkenes and Alkynes - Conformations and Hybridisation |
 71%
From NCERT

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