STANDARDPhysics-Kinetic Theory of Gases
STANDARD Physics Root Mean Square Speed MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The root mean square (rms) speed of oxygen molecules O₂ at a certain temperature T (absolute) is v. If the temperature is doubled and oxygen gas dissociates into atomic oxygen, the rms speed:
A
becomes v/√2
B
remains v
C
becomes √2v
D
becomes 2v
Correct Answer
Option D
Detailed Explanation
vₘₛ ∝ √(T/M). T is doubled and M has become half. Therefore vₘₛ will become two times.
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