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Degree of fre...

Question

Degree of freedom of unknown gas is $3$ . The gas can be

A

H_{2}

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B

O_{2}

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C

C O_{2}

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D

H e

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Solution

The correct option is D $H e$
We know that,
$f = 3 A - B$
where $A =$ No. of independent particles
$B =$ No. of independent restrictions
For $H e$ (Monoatomic gas),
$A = 1, B = 0$
$∴ f = 3 \times 1 - 0 = 3$

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