Person with following blood group are considered to be universal recipient
One of the main function of the earth's ozone layer is to
A light year is a unit of
Basic metals can be converted into gold by
The famous book; Al ' Qanun was written by the Muslim scientist
Which of the following elements is not present abundantly in earth's crust
Rectified spirit contains alcohol about
Which woody raw material is used for the manufacture of paper pulp
Human population growth is greatest in developing countries because
Radioactive isotope of Uranium used in Nuclear Bomb is
