What happens to the orientations of the molecules of a magnetised iron bar ?

What happens to the kinetic energy of the molecules of a substance when it is cooled ?

What happens to the potential energy of the molecules when a solid body is compressed ?

When an iron bar is placed nearer to the north pole of magnet, the south poles of the molecular magnets in the iron bar point towards______

What happens to the kinetic energy of gas molecules with rise of temperature ?

What happens to the weight of iron, when it rusts?

What happens when light falls on chlorophyll molecules ?

When magnetised, length of an iron bar

What would happen to the roadside iron railings if they are not pained ? Why does it happen so ?