Waec Chemistry 2005 Past Questions and Answers

Question 16:

• WAEC 2005

HNO₃ does not usually react with metals to liberate hydrogen because HNO₃ is

A. A strong acid
B. A corrosive acid
C. An oxidizing agent
D. A nitrating agent

Question 17:

• WAEC 2005

Which of the following is not an acid anhydride?

A. P ₂O ₅
B. NO ₂
C. SO ₂
D. CO

Question 18:

• WAEC 2005

NaHCO_3(s) can be distinguished from Na₂CO_3(s) by the action of

A. Dilute hydrochloric acid
B. Carbon (IV) oxide
C. Aqueous ammonia
D. Heat

Question 19:

• WAEC 2005

What process is involved in the reaction represented by the following equation? AICI₃ + 3H₂O_(l) → AI(OH) _3(s) + 3HCI_(g)

A. Dehydration
B. Hydrolysis
C. Double decomposition
D. Neutralization

Question 20:

• WAEC 2005

A salt that absorbs moisture from the atmosphere without forming a solution is said to be

A. Efflorescent
B. Deliquescent
C. Hygroscopic
D. Insoluble