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Test: Kinetic Energy and Molecular Velocities - Chemistry MCQ
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10 Questions MCQ Test Physical Chemistry - Test: Kinetic Energy and Molecular Velocities
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Test: Kinetic Energy and Molecular Velocities - Question 1
What is the ratio of urms to ump in oxygen gas at 298k?
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Test: Kinetic Energy and Molecular Velocities - Question 2
What is the ratio of root mean square speed of 16 grams of Oxygen to 4 grams of hydrogen?
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Test: Kinetic Energy and Molecular Velocities - Question 3
If the root mean square speed of an argon gas atom at temperature T is equal to the average speed of a helium gas atom at -20 °C, then T will be:
Given:- atomic mass of Ar = 39.9 u
Atomic mass of He = 4.0 u
Test: Kinetic Energy and Molecular Velocities - Question 4
What is the ratio of the rms velocities of 2 moles of hydrogen to five moles of helium?
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Test: Kinetic Energy and Molecular Velocities - Question 5
Calculate the root mean square speed of hydrogen in m/s at 27°C?
Detailed Solution for Test: Kinetic Energy and Molecular Velocities - Question 5
We have R = 8.314 kgm2/s2, M = 10-3 kg/mol and T = 300 k. So by substituting the formula we get, urms =
Test: Kinetic Energy and Molecular Velocities - Question 6
The speed of three particles is recorded as 3 m/s, 4 m/s, and 5 m/s. What is a root mean square speed of these particles?
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Test: Kinetic Energy and Molecular Velocities - Question 7
Which of the following is greater for identical conditions and the same gas?
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Test: Kinetic Energy and Molecular Velocities - Question 8
Which among the following options do you think has the highest average speed?
Detailed Solution for Test: Kinetic Energy and Molecular Velocities - Question 8
where R is universal gas constant, T is a temperature in Kelvin and M is the mass in kilograms. From the formula, we understand that the average speed is inversely proportional to the root over the mass. As hydrogen has the least mass among the options it has the highest average speed.
Test: Kinetic Energy and Molecular Velocities - Question 9
According to kinetic theory of gases , the root mean square velocity is directly proportional to:
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Test: Kinetic Energy and Molecular Velocities - Question 10
The root mean square speed of a gas at a certain condition is 1.128 times greater than the most probable speed.
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