Waec Chemistry 2012 Past Questions and Answers

Question 36:

• WAEC 2012

The oxidation number of Fe in [Fe(CN)\(_6\)]\(^{3-}\) is

A. +3
B. +2
C. -2
D. -3

Question 37:

• WAEC 2012

Consider the following reaction equation: C\(_{16}\)H\(_{34}\) → C\(_5\)H\(_{12}\) + C\(_{11}\)H\(_{22}\). The process represented by the equation is

A. Cracking
B. Fermentation
C. Polymerization
D. Reforming

Question 38:

• WAEC 2012

Which of the following substances would not produce ethanol when fermented?

A. Cane sugar
B. Glucose
C. Starch
D. Vinegar

Question 39:

• WAEC 2012

An alkanol can be prepared by the reaction of an alkene with

A. Concentrated tetraoxosulphate (VI) acid
B. Bromine tetrachloroethane
C. Aqueous potassium tetraoxomanganate (VII)
D. Sodium hydroxide solution

Question 40:

• WAEC 2012

A tertiary alkanol has a molecular formula C\(_4\)H\(_{10}\)O. What is the structural formula of the compound?

A. (CH ₃)₂CHCH₂OH
B. CH₃CH₂CH(OH)CH₃
C. (CH₃)₃COH
D. CH₃CH₂CH₂CH₂OH