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Faraday's First Law

The molcular ...

Question

The molcular weight of $O_{2}$ and $S O_{2}$ are $32$ and $64$ respectively. At $15^{\circ} C$ and $150 m m H g$ pressure, one litre of $O_{2}$ contains $^{'} N^{'}$ molecules. The number of molecules if two litres of $S O_{2}$ under the same conditions of temperature and pressure will be ________.

A

N

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B

2 N

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C

4 N

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D

\frac{N}{2}

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Solution

The correct option is B $2 N$
One litre of $O_{2}$ contains $N$ molecules at $15^{\circ} C$ and $150 m m H g$ pressure. If $1 L$ of one gas contains $N$ molecules then $2 L$ of any gas under the same conditions will contain $2 N$ molecules.

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