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How many hydrogen atoms does a single ring cycloalkane have less than the corresponding open-chain...

Chemistry
JAMB 2005

How many hydrogen atoms does a single ring cycloalkane have less than the corresponding open-chain alkane?

  • A. Two
  • B. Three
  • C. Four
  • D. One
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Correct Answer: Option A
Explanation

Let's consider an example:

Cycloalkane →  Cyclopropane has the formula  CH\(_2\)-CH\(_2\)-CH\(_2\) (when drawn in a cyclic form) = C\(_3\)H\(_6\)

Open chain alkane → Propane has the formula  CH\(_3\)CH\(_2\)CH\(_3\) (when drawn on a straight chain) = C\(_3\)H\(_8\)

Comparing the two formulas; C\(_3\)H\(_6\) and C\(_3\)H\(_8\), the difference in the hydrogen atoms is two.

There is an explanation video available below.


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Explanation Video

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