Chemistry

1.The nucleus of an atom consists of

electrons and neutrons electrons and protons protons and neutrons All of the above

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

molality molarity normality formality

3.The most electronegative element among the following is

sodium bromine fluorine oxygen

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

Na Ag Hg Fe

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

smelting roasting calcinations froth floatation