Waec Chemistry 1997 Past Questions and Answers

Question 26:

• WAEC 1997

The reaction between alkanoic acids and alkanols in the presence of a mineral acid is known as

A. Saponification
B. Hydrolysis
C. Polymerization
D. Esterification
E. Dehydration

Question 27:

• WAEC 1997

Which of the following is the relative molecular mass of a compound which has empirical formula CH\(_2\)O? (H = 1; C = 12; O = 16)

A. 42
B. 45
C. 126
D. 180
E. 145

Question 28:

• WAEC 1997

The by-product of the fermentation of sugar to ethanol is

A. Propane -1,2,3-triol
B. Ethyl ethanoate
C. Ethanedioc acid
D. Propanol
E. Carbon (lV) oxide

Question 29:

• WAEC 1997

Alkanes react with the halogens mainly by

A. Oxidation
B. Polymerization
C. Addition
D. Reduction
E. Substitution

Question 30:

• WAEC 1997

Which of the following is used widely in the manufacture of flavours and perfumes?

A. Alkanoates
B. Alkanones
C. Alkanes
D. Complex sugars
E. Aliphatic compounds