Waec Chemistry 2008 Past Questions and Answers

Question 41:

• WAEC 2008

A solution of a salt was acidified with HCI when a few drops of BaCI₂ solution were added, a white precipitate was formed. Which of the following anions is present in the salt?

A. CO^2-₃
B. NO^-₃
C. SO^2-₄
D. SO^2-₃

Question 42:

• WAEC 2008

Which of the following substances causes the depletion of the ozone layer in the atmosphere?

A. Carbon (IV) oxide
B. Chlorofluorocarbon
C. Sulphur (IV) oxide
D. Hydrocarbons

Question 43:

• WAEC 2008

Chemicals that are produced in small quantities and with very high degree of purity are

A. Bulk chemicals
B. Fine chemicals
C. Heavy chemicals
D. Light chemicals

Question 44:

• WAEC 2008

Aluminium is a good roofing material because it

A. Is strong and does not conduct heat and electricity
B. Readily absorbs light
C. Forms an oxide film over its surface which prevents corrosion
D. Is flexible and can conduct heat

Question 45:

• WAEC 2008

Which of the following alloys is mainly used in making statues?

A. Brass
B. Bronze
C. Duralumin
D. Steel