Physics · 2021
JEE Main · 27 July 2021, Shift 1 · Q14
The number of molecules in one litre of an ideal gas at 300 K and 2 atmospheric pressure with mean kinetic energy 2 × 10^-9 J per molecule is:
The number of molecules in one litre of an ideal gas at $\displaystyle 300$ K and $\displaystyle 2$ atmospheric pressure with mean kinetic energy $\displaystyle 2 \times 10^{-9} \mathrm{~J}$ per molecule is :
Official answer
(2)
$\displaystyle 1.5 \times 10^{11}$
More from Kinetic Theory of Gases
- A flask contains argon and oxygen in the ratio of 3: 2 in mass and the mixture is kept at 27^° C. The ratio of their average kinetic energy per…2022
- A container of fixed volume contains a gas at 27°C. To double the pressure of the gas, the temperature of gas should be raised to ____ °C.2025
- On the basis of kinetic theory of gases, the gas exerts pressure because its molecules:2021
- The relation between root mean square speed ( v_rms ) and most probable speed ( v_p ) for the molar mass M of oxygen gas molecule at the temperature…2022
- A sample contains mixture of helium and oxygen gas. The ratio of root mean square speed of helium and oxygen in the sample, is:2024
- A gas mixture consists of 2 moles of oxygen and 4 moles of neon at temperature T. Neglecting all vibrational modes, the total internal energy of the…2023
- An air bubble of volume 2.9 cm^3 rises from the bottom of a swimming pool of 5 m deep. At the bottom of the pool water temperature is 17 °C. The…2026
- 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…2026
JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.