Metals and their compounds - Jamb Chemistry Past Questions and Answers

Question 111:

• JAMB 2014

In the extraction of sodium from fused sodium chloride, the anode is made of platinum because

A. Sodium is formed at the anode
B. Chlorine is formed at the anode
C. Sodium does not react with platinum
D. Chlorine does not react with platinum

Question 112:

• JAMB 2014

A compound that gives a brick-red colour to a non-luminous flame is likely to contain

A. Copper ions
B. Sodium ions
C. Calcium ions
D. Aluminium ions

Question 113:

• JAMB 2015

Iron is often galvanized in order to

A. Make it more malleable
B. Remove the impurities unit
C. Protect it against corrosion
D. Render it passive

Question 114:

• JAMB 2015

Alloys are best prepared by

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

Question 115:

• JAMB 2015

The substance that is used in the steel industry for the removal of carbon. Sulphur and phosphorus impurities from pig iron is

A. Oxygen
B. Chlorine
C. Nitrogen
D. Hydrogen