The ratio of adiabatic to isothermal elasticity of diatomic gas is:-

1.67

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1.4

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1.33

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1.27

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Solution

The correct option is B $1.4$
The ratio of adiabatic to isothermal elasticity of diatomic gas is,

$γ = \frac{C_{p}}{C_{v}}$

$= \frac{C_{v} + R}{C_{v}}$

$= \frac{\frac{7 R}{2}}{\frac{5 R}{2}}$

$= \frac{7}{5} = 1.4$

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