Metals and their compounds - Jamb Chemistry Past Questions and Answers

Question 11:

• JAMB 1979

Two metallic ions associated with hard water are

A. Copper and zinc
B. Magnesium and silver
C. Calcium and magnesium
D. Potassium and tin
E. Sodium and lead

Question 12:

• JAMB 1979

Bronze is an alloy of

A. Copper, zinc and nickel
B. Aluminium and copper
C. Copper and zinc
D. Tin and zinc
E. Tin and copper

Question 13:

• JAMB 1979

Pick out the correct statement

A. Zin heated to redness reacts with steam to give oxygen and zinc oxide
B. Zinc heated to redness reacts with steam to give oxygen and hydrogen
C. Zinc does not react with hot or cold water
D. Zinc reacts with hot water to form zinc oxide and hydrogen
E. Zinc reacts very easily with cold water to give zinc oxide and hydrogen

Question 14:

• JAMB 1980

The alloy duralumin is used for the building of aeroplanes because it?

A. Asborbs heat readily from sure thereby preventing the inside of the plane from getting cold at high attitudes
B. Reflects sunlight readily, thereby keeping the inside of the plane cool
C. Is extremely durable and possesses reflective ability
D. Is easily the lightest building material
E. Possesses both strenght and lightness

Question 15:

• JAMB 1980

A sample of an oxide of mercury weighed 1.00g. When this was heated, oxygen was given off, and 1.00g of mercury metal only was left. What is the formula of the oxide?

A. Hg₂O
B. HgO₂
C. HgO₂
D. HgO
E. None of the above