Question 566:

• JAMB 1988

The molar ratio of oxygen to nitrogen in dissolved air is 2:1 whereas the ratio is 4:1 in atmospheric air because?

A. Nitrogen is less soluble than oxygen
B. Oxygen is heavier than nitrogen
C. Nitrogen has a higher partial pressure in air
D. Gases are hydrated in water

Question 567:

• JAMB 1988

An eruption pollution an environment with gas suspected to be H₂S, a poisonous gas. A residue team should spray the environment with?

A. Water
B. Moist SO₂
C. Acidified KMnO₄ and water
D. Water, acidified KMnO₄ and oxygen

Question 568:

• JAMB 1988

In the experiment above, ammonium chloride crystals deposit on the walls of the tube is as a result of

A. Evaporation
B. Recrystallization
C. Sublimation
D. Fractional precipitation

Question 569:

• JAMB 1988

Which of the gas laws does the above graph illustrate?

A. Boyle
B. Charles
C. Graham
D. Gay-Lussac

Question 570:

• JAMB 1988

Use the graph above to answer this question. The mass of a substance, M, liberated at an electrode during electrolysis is proportional to the quantity of electricity, Q passing through the electrolyte. This is represented graphically by.

A. A
B. B
C. C
D. D