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Empirical & Molecular Formula

In a hydrocar...

Question

In a hydrocarbon, $C$ is $3 g$ per $g$ of hydrogen. Hence, the hydrocarbon is :

A

C H_{4}

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B

C_{2} H_{6}

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C

C_{3} H_{8}

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D

C_{4} H_{10}

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Solution

The correct option is B $C H_{4}$
In a hydrocarbon, $C$ is $3 g$ per $g$ of hydrogen.
$C$ is $\frac{3}{12}$ mole per mole of $H$ .
$C$ is $1$ mol per $4$ mol of $H$ .
Therefore, the compound is $C H_{4}$ .

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