The nucleus of an atom consists of

The number of moles of solute present in 1 kg of a solvent is called its

The most electronegative element among the following is

The metal used to recover copper from a solution of copper sulphate is

The number of d-electrons in Fe²⁺ (Z = 26) is not equal to that of

The metallurgical process in which a metal is obtained in a fused state is called

The molecules of which gas have highest speed?

The oldest rocks in the earths crust were once molten, and came from deep inside the earth. The molten rock, called magma, spewed out in volcanic eruptions during the earth;s early life and solidified into hard rocks called

The law which states that the amount of gas dissolved in a liquid is proportional to its partial pressure is

The main buffer system of the human blood is