Jamb Chemistry Past Questions and Answers

Question 371:

• JAMB 1984

Sulphur

A. Forms two alkaline oxides
B. Is spontaneously flammable
C. Burns with a blue flame
D. Conducts electricity in the molten state
E. Is usually stored in the form of sicks in water

Question 372:

• JAMB 1984

Which of the following statements is NOT true of carbon monoxide?

A. CO is poisonous
B. CO is readily oxidized at room temperature by air to form CO₂
C. CO may be prepared by reducing CO₂ mixed with coke heated to about 1000^oC
D. CO may be prepared by heating charcoal with a limited amount of O₂
E. CO is a good reducing agent

Question 373:

• JAMB 1984

From the reactions : ZnO + Na₂O \(\to\) NaZnO and ZnO + CO₂ \(\to\) ZnCO₃ it may be concluded that zinc oxide is

A. Neutral
B. Basic
C. Acidic
D. Amphoteric
E. A mixture

Question 374:

• JAMB 1984

An example of a neutral oxide is

A. AL₂O₃
B. NO₂
C. CO₂
D. CO
E. SO₂

Question 375:

• JAMB 1984

3Cl₂ + 2NH₃ \(\to\) N₂ + 6HCl. In the above reaction, ammonia acts as

A. A reducing agent
B. An oxidizing agent
C. An acid
D. A catalyst
E. A dry agent