Exercise 1

Question 1 :

The nucleus of an atom consists of

A). electrons and neutrons
B). electrons and protons
C). protons and neutrons
D). All of the above
Answer : Option C

Question 2 :

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

A). molality
B). molarity
C). normality
D). formality
Answer : Option A

Question 3 :

The most electronegative element among the following is

A). sodium
B). bromine
C). fluorine
D). oxygen
Answer : Option C

Question 4 :

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

A). Na
B). Ag
C). Hg
D). Fe
Answer : Option D

Question 5 :

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

A). smelting
B). roasting
C). calcinations
D). froth floatation
Answer : Option A