Waec Chemistry 1989 Past Questions and Answers

Question 11:

• WAEC 1989

How many carbon atoms are there in a benzene ring?

A. 4
B. 5
C. 6
D. 7
E. 8

Question 12:

• WAEC 1989

Which of the following gases will bleach moist litmus paper?

A. CI²
B. CO²
C. SO²
D. HCI²
E. N² O

Question 13:

• WAEC 1989

Given that for the reaction KOH (aq) + HCI(aq) → KCI(aq) + H2O(L) H = - 54 Kj mol-1. What is the quantity of heat involved in the reaction?2NaOH(aq) + H2SO 4(aq) → Na2SO4(aq) + 2H 2O(l)?

A. - 108Kj
B. -54 kj
C. -27 kj
D. +27 kj
E. +54 kj

Question 14:

• WAEC 1989

When an element can exist in two or more forms in the same physical state, the element is said to exhibit

A. Isotopy
B. Isomerism
C. Allotropy
D. Hygroscopy
E. Sublimation

Question 15:

• WAEC 1989

Which of the following carbohydrates does NOT usually occur in the crystalline form?

A. Fructose
B. Glucose
C. Sucrose
D. Maltose
E. Cellulose