Waec Chemistry 2014 Past Questions and Answers

Question 11:

• WAEC 2014

The relative atomic mass of chlorine is not a whole number because

A. It is the weighted average mass of all its various isotopes
B. It is the average mass of all the isotopes of the element
C. The element has strong oxidizing ability
D. The atom contains a higher number of neutrons than protons

Question 12:

• WAEC 2014

NH₄^- is formed from NH₃ and H^- by

A. Covalent bonding
B. Dative bonding
C. Hydrogen bonding
D. Ionic bonding

Question 13:

• WAEC 2014

How many lone pair (s) of electrons is present in HF?

A. O
B. 1
C. 2
D. 3

Question 14:

• WAEC 2014

An aqueous solution of Na₂CO₃ is

A. Acidic
B. Alkaline
C. Amphoteric
D. Neutral

Question 15:

• WAEC 2014

A gaseous mixture contains 0,256 g of hydrogen and 2.00 g of oxygen. The mole ration of hydrogen to oxygen in the mixture is (H=1.00; O=16,0)

A. 1:1
B. 2:1
C. 1:4
D. 8:1