Physics
For an ideal gas, which one of the following statements does not hold true?

The potential energy of the gas molecules is zero
There is no interactive force between the molecules.
The speed of all gas molecules is same
The kinetic energies of all gas molecules are not same

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
None of the given statements is correct.

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