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Physical Chemistry -- Gaseous State
21.
At stp, 0.48 g of O2 diffused through a porous partition in 1200 seconds.
What volume of CO2 will diffuse in the same time and under the same
conditions?
- A.286.5 mL
- B.346.7 mL
- C.112.2 mL
- D.224.8 mL
- Answer
- Report
Answer : [A]
22.
At what temperature will the molar KE of 0.3 mol of He be the same as
that of 0.4 mol of argon at 400 K?
- A.700 K
- B.500 K
- C.800 K
- D.400 K
- Answer
- Report
Answer : [D]
23.
Indicate which of the following statements are correct
- A.At constant temperature, the KE of all gas molecules is the same.
- B.At constant temperature, the KE of different molecules is different.
- C.At constant temperature, the KE is greater for heavier gas molecules
- D.At constant temperature, the KE is less for heavier gas molecules.
- Answer
- Report
Answer : [A]
24.
The rms speed of N2 molecules in a gas is u. If the temperature is doubled
and the nitrogen molecules dissociate into nitrogen atoms, the rms speed becomes
- A.u/2
- B.2 u
- C.4 u
- D.14 u
- Answer
- Report
Answer : [B]
25.
Consider a mixture of SO2 and O2 kept at room temperature. Compared
to the oxygen molecule, the SO2 molecule will hit the wall with
- A.smaller average speed
- B.greater average speed
- C.greater kinetic energy
- D.greater mass
- Answer
- Report
Answer : [D]
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