Define the terms conformation and conformational isomerism. fro

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 Multiple Choice QuestionsLong Answer Type

111.

Discuss:
(a) Nitration of an alkane.
(b) Sulphonation of alkane.

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 Multiple Choice QuestionsShort Answer Type

112. What do you mean by isomerization of alkanes?
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 Multiple Choice QuestionsLong Answer Type

113.

Explain briefly the process of cracking or pyrolysis.

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114. What are the products of chlorination of methane? Describe the mechanism of the formation of each?
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115.

What is reforming (or aromatization)? Why is it done?

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 Multiple Choice QuestionsShort Answer Type

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116.

Define the terms conformation and conformational isomerism.


The conformation of a molecule refers to different three-dimensional positions of atoms or groups relative to each other, arising from rotation about single (σ) bonds. The energy required for rotation about C-C bond or a bond is very low and such rotations usually occur readily. So, the various conformations of a molecule are freely interconvertible. This phenomenon of getting different conformations arising from rotation about a single or sigma bond is called conformational isomerism. 

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117.

Define the terms conformation and conformational isomerism.

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118. Discuss the conformation in the molecule of ethane.
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 Multiple Choice QuestionsLong Answer Type

119.

Out of staggered and eclipsed conformations of ethane, which is more stable and why ?

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 Multiple Choice QuestionsShort Answer Type

120.

Can eclipsed and staggered conformations of ethane be isolated? Give reasons.

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