
Concept explainers
Interpretation:
The correct statement related to the movement of gas particles based on kinetic theory of gases needs to be explained.
Concept introduction:
The kinetic theory of gases explains the nature of gas molecules. According to this theory, gas molecules in a container move in random directions. During their motion, they collide with each other and walls of the container.

Answer to Problem 7STP
Option (d) is correct.
Explanation of Solution
Reason for correct option/s:
(d)
Gas particles are having the constant random motion at temperature above absolute zero because speed of the gas molecules is directly proportional to temperature.
Reason for incorrect option/s:
(a) The gas molecules do not have the same speed at a given temperature because each molecule has slightly different kinetic energy due to difference in their molar masses. So the given option (a) is incorrect.
(b) Gas molecules move in straight lines in all the directions and not in curved lines. So the given option (b) is incorrect.
(c) The movement of gas particles increases with increasing temperature. The speed of gas molecules is directly proportional to temperature.
Thus, all the mentioned properties regarding movement of gas particles based on kinetic theory of gases are incorrect except option (d).
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