Metals and their compounds - Jamb Chemistry Past Questions and Answers

Question 76:

• JAMB 2003

The modern process of manufacturing steel for iron is by

A. Treatment with acids
B. Oxidation
C. Blast reduction
D. Treatment with alkanal

Question 77:

• JAMB 2004

Alloys are best prepared by

A. Electroplating
B. Arc-welding
C. Reducing and mixture of their metallic oxide
D. Cooling a molten mixture of the metals

Question 78:

• JAMB 2004

Sodium metal is always kept under oil because it

A. Readily reacts with water
B. Is reduced by atmospheric nitrogen
C. Reacts vigorously on exposure to air
D. Reacts with oxygen and carbon (IV) oxide

Question 79:

• JAMB 2005

When iron is exposed to moisture and it rusts, the value of ΔG for the reaction is

A. Neutral
B. Zero
C. Positive
D. Negative

Question 80:

• JAMB 2005

What will happen if an aluminium spoon is used to stir a solution of iron (II) trioxonitrates (V)?

A. The spoon will be oxidized while the iron (II) ions will be reduced to the metal
B. The spoon will increase in size
C. The spoon will be reduced while the iron (II) ions will be oxidized
D. The spoon will be reduced