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A sealed container with negligible co-efficient of volumetric expansion contains helium (a monatomic gas)

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A sealed container with negligible co-efficient of volumetric expansion contains helium (a monatomic gas) when it is heated from 200K to 400K, the average K.E. of helium atom is 

(A) Halved 

(B) Doubled 

(C) Unchanged 

(D) Increased by factor √2

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1 Answer

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Best answer

The correct option (B) Doubled

Explanation:

Avg. KE = (3 / 2) KBT i.e. KE ∝ T 

Hence if temperature is doubled then KE will also get doubled.

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