States of Matte...

Direction (Q. Nos. 1-11) This section contains 11 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE option is correct.

Q. Helium atom is two times heavier than a hydrogen molecule (H₂). At 298 K, the average kinetic energy of helium atom is

Mass of gas is 300 gm and its specific heat at constant volume is 750J/kg K. if gas is heated through 75°C at constant pressure of 10⁵ N/m², it expands by volume 0.08 × 10⁶ cm³. find C_P/C_V.

At what temperature will the collision frequency in N₂ be equal to that in He at 25°C if both gases are at a pressure of 1.00 bar collision diameter = 0.373 nm for N₂ = 0.218 nm for He (Assume equal number of molecules per unit volume.)

According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels

[IIT JEE 2003]

As the tem perature is raised from 20°C to 40°C. The average kinetic energy of the neon atoms changes by a factor of which of the following?

[IIT JEE 2004]

Which one of the following statements is not true about the effect of an increase in temperature on the distribution of molecular speeds in a gas?

[IIT JEE 2005]

Bond energy of H₂ gas is 104 kcal mol^-1. The temperature at which average kinetic energy of gaseous H₂ molecules is equal to energy required to dissociate the molecules into atoms, is

Compressibility factor for CO₂ at 400 K and 71.0 bar is 0.8697. Molar volume of CO₂ under these conditions is

At what temperature will the hydrogen molecules have the same kinetic energy per mole as nitrogen molecules at 280 K?

Temperature at which average translation energy of a molecule is equal to the kinetic energy of the electron in first Bohr is orbit is

Pressure (p) of an ideal gas is related to kinetic energy (E) per unit volume by equation

Direction (Q. Nos. 12 and 13) This sectionis based on statement I and Statement II. Select the correct answer from the code given below.

Q. 

Statement I : The pressure exerted by a gas is the result of collisions of the molecules with the walls of the container.

Statement II : Due to collision, momentum is changed and rate of change of momentum is equal to force.

Statement I : As velocity increases, distribution of molecules increases and is maximum at most probable velocity, after which distribution of molecules decreases.

Statement II : Most probable velocity is given by