Which plough helps cutting of creeping or spreading grass and inversion?
A disc plough can be forced to penetrate into the soil which is too hard and dry for working with a mouldboard plough. It works well in sticky soils in which a mouldboard plough does not scour.
The important ore of aluminium is-
An electric iron has a heating element made of:
Formation of ozone hole is maximum over
The gas used for filling weather balloons is-
The absolute value of the charge on electron was determined by-
The important ore of aluminium is-
Which one amongst the following is not a Green House gas?
A polymeric substance used to make parachute is
The acid used in lead storage cells is-
Alum stops bleeding in minor cuts because of
