Waec Chemistry 2003 Past Questions and Answers

Question 26:

• WAEC 2003

A given fuel has an octane number of 100. This means that

A. The knocking tendency of the fuel is low
B. The fuel is a mixture of several hydrocarbons
C. A large amount of alkanes is present in the fuel
D. The fuel needs to be cracked before use

Question 27:

• WAEC 2003

Wine containing 8% to 17% ethanol can be converted to gin containing about 40% ethanol by

A. Evaporation
B. Distilation
C. Fermentation
D. Oxidation

Question 28:

• WAEC 2003

Which of the following substances could be responsible for the banana taste of a food flavour?

A. Methylbenzene
B. Butanol
C. Ethanol
D. Pentylethanoate

Question 29:

• WAEC 2003

What is the organic product of the reaction of C₂H ₅OH with excess acidified K ₂Cr ₂O_7(aq)?

A. CH₃COOH
B. C₂H₅OC₂H₅
C. HCOOCH ₃
D. C₂H₅CHO

Question 30:

• WAEC 2003

The reaction of vegetable oil with a solution of wood ash is

A. Saponification
B. Neutralization
C. Hydrogenation
D. Esterification