MCQ
At a given temperature the root mean square velocities of oxygen and hydrogen molecules are in the ratio
- A$16:1$
- B$1:16$
- C$4:1$
- ✓$1:4$
✓
Answer
Correct option: D.
$1:4$
d
${v_{rms}} \propto \frac{1}{{\sqrt M }};$
${v_{rms}} \propto \frac{1}{{\sqrt M }};$
$\therefore$ $\frac{{{{({v_{rms}})}_{{O_2}}}}}{{{{({v_{rms}})}_{{H_2}}}}} = \sqrt {\frac{{{M_{{H_2}}}}}{{{M_{{O_2}}}}}} = \sqrt {\frac{2}{{32}}} = 1:4$
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