Waec Chemistry 2006 Past Questions and Answers

Question 21:

• WAEC 2006

What type of reaction occurs between vegetable oil and plant ash extract?

A. Displacement
B. Dehydration
C. Neutralization
D. Saponiflication

Question 22:

• WAEC 2006

Which of the following compounds is an alkanoate?

A. CH₃COOH
B. CH₃COOCH₃
C. CH₃CH₂OH
D. CH₃CH₂COOH

Question 23:

• WAEC 2006

What is C_aH_b in the following equation? C _a
H _b + 5O₂ → 3CO ₂ + 4H₂O

A. C ₃H₄
B. C₃H₆
C. C₃H₈
D. C ₅H ₁₀

Question 24:

• WAEC 2006

Greenhouse effect can be reduced by controlling

A. Water evaporation
B. Burning wood and fossil fuel
C. The use of aerosols
D. The use of artificial fertilizers

Question 25:

• WAEC 2006

Waste plastics accumulate in the soil and pollute the environment because plastic materials are

A. Insoluble in water
B. Non -biodegradable
C. Easily affected by heat
D. Inflammab,le