MCQ
The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is
- ✓$4:1$
- B$1:2$
- C$1:4$
- D$1:1$
$C \propto \frac{1}{\sqrt{M}}$
$\frac{C_{H_2}}{C_{O_2}}=\sqrt{\frac{32}{2}}=4: 1$
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The correct relation between these parameters are
Assertion $(A)$ : Time period of oscillation of a liquid drop depends on surface tension $(S)$, if density of the liquid is $p$ and radius of the drop is $r$, then $T = k \sqrt{ pr ^{3} / s ^{3 / 2}}$ is dimensionally correct, where $K$ is dimensionless.
Reason $(R)$: Using dimensional analysis we get $R.H.S.$ having different dimension than that of time period.
In the light of above statements, choose the correct answer from the options given below.

