An alkane has C/H ratio (by mass) of 5.1428. Its molecular formula is

C_{8} H_{18}

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C_{7} H_{16}

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C_{5} H_{12}

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C_{6} H_{14}

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Solution

The correct option is D $C_{6} H_{14}$
Ratio is $\frac{12 \times 6}{1 \times 14} = \frac{72}{14} = 5.1428$
This way the ratio has to be calculated for each case to find the answer.

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