Chemistry 2018 Waec Past Questions and Answers

Question 1 :

• WAEC 2018

Which of the following raw materials is used in the plastic industry?

A. Ethene
B. Methane
C. Sulphur
D. Hydrogen

Question 2 :

• WAEC 2018

Which of the following raw materials is used in the plastic industry?

A. Ethene
B. Methane
C. Sulphur
D. Hydrogen

Question 3 :

• WAEC 2018

Which of the following organic compounds can undergo both addition and substitution reactions?

A. Pentane
B. Benzene
C. Propane
D. Hexane

Question 4 :

• WAEC 2018

Which of the following equations represents a redox reaction?

A. \(HNO_{{3}{(aq)}} + NaOH_{(aq)} \to NaNO_{{3}{(aq)}} + H_{2}O_{(l)}\)
B. \(AgNO_{{3}{(aq)}}+KCl_{(aq)} \to AgCl_{(s)}+KNO_{{3}{(aq)}}\)
C. \(CaCO_{{3}{(s)}} \to CaO_{(s)} + CO_{{2}{(g)}}\)
D. \(2H_{2}S_{(s)} + SO_{{2}{(g)}} \to 2HO_{2} + 3S_{(g)}\)

Question 5 :

• WAEC 2018

The process of extraction of iron from its ore is

A. Decomposition
B. Oxidation
C. Reduction
D. Sublimation