Why do molecules in a gas follows zig-zag path ?

How will you justify the following postulates of the kinetic theory of gases ? (i) Molecules in a gas follow zig-zag path. (ii) Collisions among the gas molecules are of elastic nature. (iii) There are no forces of interaction among the gas.

The mean free path of molecules of an ideal gas of diameter d is proportional to

The average speed of all the molecules in a gas at a given instant is not zero, whereas the average velocity of all the molecules is xero. Explain why ?

If the number density of molecule of an ideal gas becomes 4 time then its mean free path becomes

The t RNA molecules with the following anti codons do not exist in cells

Comment on the following statement: the temperature of all the molecules in a sample of a gas is the same.

Why do molecules diffuse down their concentration gradients ?

if the mean free path of a molecule of an ideal gas having diameter 10^(-8)cm is 10^(-4) cm, calculate the number density of the gas molecule.

Assertion : The rms velocity and most probable speeds of the molecules in a gas are same. The Maxwell distribution curve for the speed of the molecules in a gas is symmetrical.

Assertion: All molecules of an ideal gas more with the same speed. Reason: There is no attraction between the molecules in an ideal gas.