Kinetic molecular theory of gases MCQ Advance Level

Compared to other sections, Chemistry is considered to be the most scoring section. If prepared thoroughly, chemistry can help students to secure a meritorious position in the exam. These questions are very important in achieving your success in Exams after 12th.

Q1. Helium atom is two times heavier than a hydrogen molecule at 298 K, the average kinetic energy of helium is

•  Two times that of a hydrogen molecule
•  Same as that of a hydrogen molecule
•  Four times that of a hydrogen molecule
•  Half that of a hydrogen molecule

Same as that of a hydrogen molecule

Q2. Which of the following is valid at absolute zero

•  Kinetic energy of the gas becomes zero but the molecular motion does not become zero
•  Kinetic energy of the gas becomes zero and molecular motion also becomes zero
•  Kinetic energy of the gas decreases but does not become zero
•  None of the above

Kinetic energy of the gas becomes zero and molecular motion also becomes zero

Q3. If a gas is expanded at constant temperature

•  The pressure increases
•  The kinetic energy of the molecules remains the same
•  The kinetic energy of the molecules decreases
•  The number of molecules of the gas increases

The kinetic energy of the molecules remains the same

Q4. The average K.E. of an ideal gas in calories per mole is approximately equal to

•  Three times the absolute temperature
•  Absolute temperature
•  Two times the absolute temperature
•  1.5 times the absolute temperature

Three times the absolute temperature

Q5. According to kinetic theory of gases, for a diatomic molecule

•  The pressure exerted by the gas is proportional to the mean velocity of the molecules
•  The pressure exerted by the gas is proportional to the root mean square velocity of the molecules
•  The root mean square velocity is inversely proportional to the temperature
•  The mean translational kinetic energy of the molecules is proportional to the absolute temperature

The mean translational kinetic energy of the molecules is proportional to the absolute temperature

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