The molecular weight of $O_{2} and {SO}_{2} are$ 32 and 64 respectively. If one litre of $O_{2} at 15^{0} c$ and 750 mm pressure
contains ‘N’ molecules, the number of molecules in two litres of ${SO}_{2}$ under the same conditions of temperature
and pressure will be

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$2 N$

$\frac{N}{2}$

$4 N$

answer is A.

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Detailed Solution

$1 Litre of O_{2} \overset{at 15^{0} c, 750 mm}{\to}' N' 2 Litre of O_{2} \overset{at 15^{0} c, 750 mm}{\to} 2 N 2 Litre of {SO}_{2} \overset{at 15^{0} c, 750 mm}{\to} 2 N$

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