StudentAidUnit 13: Thermal Physics — Mcqs
12th Class Physics · Unit 13: Thermal Physics
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MCQ 13.1.Which condition is necessary for most gases to behave nearly ideally?
- a Low temperature and low pressure
- b High temperature and low pressure
- c Constant temperature and low pressure
- d High temperature and constant pressure
MCQ 13.2.v(rms) of the gas molecule is 300 m s⁻¹. If its absolute temperature is reduced to half and molecular weight is doubled, then v(rms) will become:
MCQ 13.3.The rms speed of the gas at 27 °C is v. If temperature of the gas is raised to 327 °C, the rms speed of the gas is: [Options as printed: (a) v (b) v/√2 (b) v√2 (c) 3v]
- a v
- b v/√2
- c v√2
- d 3v
MCQ 13.4.Ratio of the rms velocities of O₂ and H₂ at equal temperature will be:
MCQ 13.5.In a closed room, there is a gas with pressure of 3.2 × 10⁵ N m⁻². If the gas density is 6 kg m⁻³, what is the effective speed of each gas particle?
MCQ 13.6.Which statement is not the statement of kinetic theory of gases?
MCQ 13.7.Which equation ensures that a star remains stable against gravitational collapse?
MCQ 13.8.What happens to a star when its gravitational force becomes greater than its internal pressure?