Metals and their compounds - Jamb Chemistry Past Questions and Answers

Question 71:

• JAMB 2001

An elements X with relative atomic mass 16.2 contains two isotopes ¹⁶₈X with relative abundance of 90% and ^m₈X with relative abundance of 10%. The value of m is

A. 16
B. 18
C. 12
D. 14

Question 72:

• JAMB 2001

A metal M displaces zinc from zinc chloride solution. This shows that

A. M is more electronegative than zinc
B. Zinc is above hydrogen in the series
C. M is more electropositive than zinc
D. Electrons flow from zinc to M

Question 73:

• JAMB 2001

The main impurity in iron ore during the extraction of iron is

A. Silicon (IV) oxide
B. Carbon (IV) oxide
C. Calcium trioxosilicate
D. Sulphur (II) oxide

Question 74:

• JAMB 2001

The gas that can best be collected by downward displacement of air is

A. Chlorine
B. Sulphur (IV) oxide
C. Ammonia
D. Carbon (IV) oxide

Question 75:

• JAMB 2003

The metal that liberates hydrogen from cold water in bubbles only is

A. Na
B. K
C. Ca
D. Al