Chemistry and Industry - Jamb Chemistry Past Questions and Answers

Question 51:

• JAMB 1991

A quantity of air was passed through a weighed amount of alkaline pyrogallol. An increase in the weight of the pyrogallol would result from the absorption of?

A. Nitrogen
B. Neon
C. Argon
D. Oxygen

Question 52:

• 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 53:

• 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 54:

• JAMB 1991

Magnesium (IV) oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to?

A. Increase the surface area of the reactants
B. Increase the concntration of the reactants
C. Lower the activation energy for the reaction
D. Lower the heat of reaction, ∆H, for the reaction

Question 55:

• JAMB 1991

Which of the following gases will rekindle a brightly glowing splint?

A. NO₂
B. NO
C. N₂O
D. CI₂