Which of the following gases will have density 1.8 g/L at 760 torr pressure and $27^{\circ}$ C ?

O_{2}

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C O_{2}

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N H_{3}

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S O_{2}

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Solution

The correct option is B $C O_{2}$
$P M = d R T \Rightarrow M = \frac{d R T}{p} = \frac{1.8 \times 0.0821 \times 300}{1} = 44$
$∴$ The gas will be $C O_{2}$ .

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