Mix Examples-Kinetic Theory of Gases PYQs: JEE Mains Physics

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1. 1. \(5\) moles of unknown gas is heated at constant volume from \(10 \, °C\) to \(20 \, °C\). The molar specific heat of this gas at constant pressure \(c_p = 8\) cal/mol.°C and \(R = 8.36\) J/mol.°C. The change in the internal energy of the gas is _______ calorie. 2026 Medium
2. 2. A mixture of carbon dioxide and oxygen has volume \(8310\) cm\(^3\), temperature \(300\) K, pressure \(100\) kPa and mass \(13.2\) g. The number of moles of carbon dioxide and oxygen gases in the mixture respectively are _______.
   (Assume both carbon dioxide and oxygen gases behave like ideal gases) \([R = 8.31\) J/mol.K\(]\) 2026 Hard
3. 3. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
   
   Assertion A: If the average kinetic energy of \(H_2\) and \(O_2\) molecules, kept in two different sized containers are same, then their temperatures will be same.
   
   Reason R: The r.m.s. speed of \(H_2\) and \(O_2\) molecules are same at same temperature.
   
   Choose the correct answer from the options given below 2026 Medium

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