JEE Mains · Physics · STD 11 - Kinetic theory of gases
- JEE Mains 2022
- Medium
- MCQ
Following statements are given : \((1)\) The average kinetic energy of a gas molecule decreases when the temperature is reduced. \((2)\) The average kinetic energy of a gas molecule increases with increase in pressure at constant temperature. \((3)\) The average kinetic energy of a gas molecule decreases with increases in volume. \((4)\) Pressure of a gas increases with increase in temperature at constant pressure. \((5)\) The volume of gas decreases with increase in temperature. Choose the correct answer from the options given below:
Pick an option to check your answer.
Answer & Solution
Correct Answer
(A) \((1)\) and \((4)\) only
Step-by-step Solution
Detailed explanation
\(KE _{\text {avg }}=\frac{3}{2} KT\)
\(P =\frac{1}{3} \rho V _{\text {rus }}^{2}\)
Note : Statement \((4)\) is correct only if we consider it at constant volume and not constant pressure. Ideally, this question must be bonus but most appropriate answer is option \((A)\).
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