If at same temperature and pressure, the densities for two diatomic gases are respectively ${d_1}$ and ${d_2}$, then the ratio of velocities of sound in these gases will be
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(a) Speed of sound $v = \sqrt {\frac{{\gamma P}}{d}} $
==>$\frac{{{v_1}}}{{{v_2}}} = \sqrt {\frac{{{d_2}}}{{{d_1}}}} $ (constant)
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