Question 691:

• JAMB 1991

A sample of temporary hard water can be prepared in the laboratory by?

A. Disolving calcium chloride in distilled water
B. Saturating lime water with carbon (IV) oxide
C. Saturating distilled water with calcium hydroxide
D. Dissolving sodium hydrogen trioxocarbonate (IV) in some distilled water

Question 692:

• JAMB 1991

A property of a colloidal dispersion which a solution does not have is?

A. The Tyndall effect
B. Homogeneity
C. Osmotic pressure
D. Surface polarity

Question 693:

• JAMB 1991

50 cm³ of sulphur (IV) oxide, 800 cm³ of ammonia, 450 cm³ of hydrogen chloride, 1.0 cm³ of at 15°C. Which of the following is suitable for demonstrating the fountain experiment?

A. Sulphur (IV) oxide hydrogen chloride
B. Carbon (IV) oxide and amonia
C. Amonia and hydrogen chloride
D. Carbon (IV) oxide and surphur (IV) oxide

Question 694:

• JAMB 1991

How many structural isomers can be written for the alkyl bromide, C₄H₉Br?

A. 3
B. 4
C. 6
D. 8

Question 695:

• JAMB 1991

What volume of CO₂ at s.t.p would be obtained by reacting trioxocarbonate (IV) with excess acid?
(G.M.V at s.t.p = 22.4 dm³)

A. 2.240 cm ³
B. 22.40 cm ³
C. 224.0 cm ³
D. 2240 cm ³