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Statement I: The mole fraction of argon in air is 0.95
Statement II: Volume percentage of all noble gases in air is much greater than unity

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An Intiative by Sri Chaitanya

I is false and II is true

Both I and II are true

Both I and II are false

I is true and II is false

answer is D.

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Detailed Solution

I and II are false.

All the noble gases except radon and oganesson occur in the atmosphere. Their atmospheric abundance in dry air is ~ 1% by volume of which argon is the major constituent.

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