The Poissons ratio for inert gases is:

1.40

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1.66

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1.34

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N o n e o f t h e s e

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Solution

The correct option is A $1.66$
For mono atomic molecule
$C_{v} = \frac{3 R}{2}$ (as can be derived from standard results)
$C_{p} = \frac{5 R}{2}$
Poissons ratio for any gas is given by:
$poissons ratio = \frac{C_{p}}{C_{v}}$
$= \frac{\frac{5 R}{2}}{\frac{3 R}{2}}$
$= \frac{5}{3}$
$≃ 1.66$

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