If 1 L of O2 at 15oC and 750 mm pressure contains N molecules, the number of molecules in 2 litres of SO2 under the same conditions of temperature and pressure will be :
A
N2
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B
N
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C
2N
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D
4N
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Solution
The correct option is C2N Under similar conditions of temperature and pressure, equal volume of gas contains equal number of molecules. ∴1L=N molecules 2L=2N molecules