MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryMole _ Equivalent ConceptAtomic and Molecular Masses

The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1: 4. The ratio of number of their molecule is :

A.7 : 32✓ Correct

B.1 : 8

C.3 : 16

D.1 : 4

Explanation

Let the mass of oxygen is = w And the mass of nitrogen is=4w Number of molecules of oxygen= / 32 A w N x Number of molecules of Nitrogen= 4 / 28 A w N x The ratio of molecules= 28/ 32 4 w w x x =7/32.

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