The molecular mass of O2 and SO2 are 32 and 64 respectively. If one litre of O2 at 15∘C and 750mm pressure contains N molecules, the number of molecules in two litre of SO2 under the same conditions of temperature and pressure will be:
A
2N
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B
N
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C
N2
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D
4N
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Solution
The correct option is B2N From ideal gas equation, PV=nRT.
Oxygen, V=1L,P=750mmHg
Sulphur dioxide, V=2L,P=750mmHg Moles of O2⟹PVRT=n1=1×1RT