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Hydrocarbons
Arrange benzene, n-hexane and ethyne in decreasing order of acidic behaviour. Also give a reason for this behaviour.
The decreasing order of acidic strength:
Hydrocarbon: Ethyne > Benzene > n-Hexane
Hybridization of C-atoms: (sp) (sp2) (sp3)
The acidic character is linked with the percentage of s-character. Greater the s-character, more is the electronegativity of the carbon atom and more will be the acidic character.
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During the pyrolysis of alkanes C-C bonds break in preference to C-H bond. Why?
Define cracking.
What is the function of iodic acid in the iodination of alkanes? Can we use any other substance in its place?
What is alternation effect?
Arrange the following compounds in order of their increasing boiling points:
n-Pentane, n-Hexane, Ethane, 2-2-Dimethylpentane, 2-Methylpentane.
Why is light or heat necessary to initiate chlorination reaction of alkanes?
What are conformation or rotational isomers?
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