1994 - WAEC Chemistry Past Questions and Answers - page 4
31
Which of the following is likely to have the highest degree of hardness?
A
Carbonated water
B
Distilled water
C
Acidified water
D
Rain water
correct option: a
Users' Answers & Comments32
Study the reaction represented by the equation: Alkanol + Alkanoic acid conc. H2SO4 Alkanoate + water. The type of process involved in the reverse reaction is
A
Neutralization
B
dehydration
C
hydrolysis
D
decomposition
correct option: c
Users' Answers & Comments33
Destructive distillation of coal means
A
heating coal in plentiful supply of air
B
burning coal in air to produce water and carbon (IV) oxide
C
heating coal in the absence of air
D
heating coal in limited supply of air
correct option: c
Users' Answers & Comments34
When magnesium ribbon burns in air, the products are
A
magnesium nitride and magnesium oxide
B
magnesium nitride and carbon (ll) oxide
C
magnesium oxide and steam
D
magnesium nitride and soot
correct option: c
Users' Answers & Comments35
The following compounds contain the same type of bonds except
A
sodium chloride
B
hydrogen chloride
C
magnesium chloride
D
potassium chloride
correct option: b
Users' Answers & Comments36
What is the molar mass of an alkyne with the formula Cx H 14? (H = 1, C = 12)
A
86g
B
92g
C
98g
D
110g
correct option: d
Users' Answers & Comments