in places of hot climate it is advised that outer walls of house be painted white explain

In places of hot climate, it is advised that the outer walls of house be painted white because white colour does not absorb any heat radiation from the sun which keep inside cool even if there is hot climate outside the house

Different colours exhibit different properties of absorbing and radiating colours . White colours is a bad absorber of heat, therefore houses in hot days are painted white so that they

Different colours exhibit different properties of absorbing and radiating colours . White colours is a bad absorber of heat, therefore houses in hot days are painted white so that they do not absorb any heat if the sun and keep the cool from inside. The second answer is mine only, but was incomplete.