Question 456:

• JAMB 1986

The approximate volume of air containing 10cm³ of oxygen is?

A. 20 cm³
B. 25 cm³
C. 50 cm³
D. 100 cm³

Question 457:

• JAMB 1986

The reaction Mg + H₂O → MgO + H₂ takes place only in the presence of?

A. Excess Mg ribbon
B. Excess cold water
C. Very hot water
D. Steam

Question 458:

• JAMB 1986

When steam is passed through red hot carbon, which of the following are produced?

A. Hydrogen oxygen and carbon (IV) oxide
B. Hydrogen and carbon (IV) oxide
C. Hydrogen and carbon (II) oxide
D. Hydrogen and trioxocarbonate (IV) acid

Question 459:

• JAMB 1986

The exhaust fumes from a garage in a place that uses petrol of high sulphur content are bound to contain?

A. CO and SO₃
B. CO and SO₂
C. CO,SO₂ and SO₃
D. CO and H₂S

Question 460:

• JAMB 1986

Oxygen-demanding waste are considered to be a water pollutant because they?

A. Deplete oxygen which is necessary for the survival of aquatic organism
B. Increase oxygen which is necessary for survival of aquatic organism
C. Increase other gaseous substances which are necessary for the survival of aquatic organisms
D. Deplete other gaseous species which is necessary for the survival of aquatic organisms