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Two balloons are filled one with pure H...

Two balloons are filled one with pure He gas and the other with air respectively. If the pressure and temperature of these balloons are same, then the number of molecules per unit volume is

A

More in the He filled balloon

B

Same in both balloons

C

More in air filled balloon

D

In the ratio of `1:4`

Text Solution

Verified by Experts

The correct Answer is:
B
`PV = nRT`
`rArr n/V = P/(RT)`= constant
At constant P and T, both balloons will contain equal no. of molecules per unit volume.
i.e. Avogadro’s law.
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