Waec Chemistry 2001 Past Questions and Answers

Question 31:

• WAEC 2001

What is the function of H₂SO₄ in the following reaction? C₁₂
H₂₂O₁₁ conc. H₂SO₄ 12C + 11H₂O

A. Oxidizing agent
B. Strong acid
C. Dehydrating agent
D. Catalyst

Question 32:

• WAEC 2001

Which of the following constitutes an advantage in the use of hard water?

A. Formation of scum with soap
B. Furring of kettles
C. Blockage of water pipes
D. Formation of strong bones

Question 33:

• WAEC 2001

Sugars can be hydrolyzed at room temperature by the action of

A. Mineral acids
B. Strong bases
C. Enzymes
D. Oxidants

Question 34:

• WAEC 2001

If 10 cm ³ of distilled water is added to 10 cm³ of an aqueous salt solution, the concentration of the solution

A. Increases
B. Decreases
C. Remains constant
D. Doubles

Question 35:

• WAEC 2001

Which of the following reactions represents the change that occurs when a photographic film is exposed to sunlight?

A. Ag → Ag⁺ + e^-
B. Ag⁺ + e^- → Ag
C. 2Ag + Br2₂ → AgBr
D. Ag⁺ + Br^- → AgBr