MCQ
Which of the following gases has maximum rms speed at a given temperature?
- ✓Hydrogen.
- BNitrogen.
- COxygen.
- DCarbon dioxide.
✓
Answer
Correct option: A.
Hydrogen.
The rms speed of a gas is given by $\sqrt{\frac{3\text{RT}}{\text{M}_\text{O}}}.$
Since hydrogen has the lowest $M_O$ compared to other molecules, it will have the highest rms speed.
Since hydrogen has the lowest $M_O$ compared to other molecules, it will have the highest rms speed.
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