• Chemistry - Section 1
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

2. 

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

A. Na
B. Ag
C. Hg
D. Fe

3. 

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

A. molality
B. molarity
C. normality
D. formality

4. 

The most electronegative element among the following is

A. sodium
B. bromine
C. fluorine
D. oxygen

5. 

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

A. p-electrons in Ne(Z = 10)
B. s-electrons in Mg(Z = 12)
C. d-electrons in Fe(Z = 26)
D. p-electrons in CI(Z = 17)