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Hydrocarbons
Alkanes with even carbon atoms have higher melting points than alkanes with an odd number of carbon atoms.Explain.
This is because alkane chains with an even number of the carbon atoms (more symmetrical) pack more closely than those with an odd number of carbon atoms (less symmetrical) in the crystalline state.
As a result, attractive forces between the individual chains of an alkane with an even number of carbon atoms are greater and thus the melting point is higher.
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Out of n-pentane, isopentane and neopentane which has lower boiling point?
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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