Jamb Chemistry 1984 Past Questions and Answers

Question 16:

• JAMB 1984

An element that can exist in two or more different structural forms which possess the same chemical properties is said to exhibit.

A. Polymerism
B. Isotopy
C. Isomorphism
D. Isomerism
E. Allotrophy

Question 17:

• 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 18:

• 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 19:

• 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 20:

• JAMB 1984

An example of a neutral oxide is

A. AL₂O₃
B. NO₂
C. CO₂
D. CO
E. SO₂