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InterviewSolution
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The correct order of boiling points of 2, 2-dimethylpropane, 2 methylbutane and n pentane isA. n-pentane gt 2,2-dimethylpropane gt 2-methylbutaneB. n-pentane gt 2-methylbutane gt 2,2-dimethylpropaneC. 2,2-dimethylpropane gt 2-methylbutanegt n-pentaneD. 2-methylbutane gt n-pentane gt 2,2-dimethylpropane |
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Answer» Correct Answer - B Branching of the chain makes the molecule more compact the thereby decreases the surface area. The intermolecular forces which depend upon the surface area, become small in magnitude on account of branching. Consequently , the boiling points of branched chain alkanes are less than the straight chain isomers. |
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