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Organic Chemistry

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Alkanes

Question
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Hydrocarbons are compounds composed of carbon and hydrogen atoms. Alkanes are hydrocarbons. As the number of carbons increases in straight-chain alkanes, there is a steady gradation of properties which can be easily compared and predicted. The properties of branched alkanes vary considerably and are hard to predict because of other intervening forces that come into play. The boiling points of a few alkanes are given below:


The total number of possible structural isomers of heptane is:

A Three
B Seven
C Nine
D Twelve
Ans. C The only way to answer this question is to draw the possible isomers by trial and error. There is no choice other than drawing out the possible structures, starting from the straight chain form of heptane.

Alkanes Flashcard List

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