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Introduction to Organic Chemistry

Choose the co...

Question

Choose the correct answer from the four alternatives given in the brackets:
Alkanes have the general formula $C_{n} H_{2 n + 2}$ . The molecular formula of the first hydrocarbon is ______.
( ${C H}_{4}, C_{2} H_{4}, C_{2} H_{6}, C_{2} H_{2}$ )

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Solution

Alkanes are the saturated hydrocarbons. They the general formula $C_{n} H_{2 n + 2}$ . Now for the first alkane $n = 1$ . Substituting in the general formula we get the first alkane formula as $C H_{4}$ .

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