Bank PO Questions

Groundwater is all the water that has penetrated the earth's surface and is found in one of two soil layers. The one nearest the surface is the "zone of aeration", where gaps between soil are filled with both air and water. Below this layer is the "zone of saturation", where the gaps are filled with water.

All India Radio founded in 1930.

With over 420 radio stations in about 23 languages & 179 dialects.

AIR is one of the largest radio broadcasters in world.

It also has 99.19% population coverage & 18 FM channels.

Mercury is the only metal that is in liqid form at room temperature. Caesium, Gallim and Rubidium are also metals that are in liquid form but at slightly high temperature than the room temperature.

Sir William Herschel discovered Infra-red radiation in 1800.