Jamb Chemistry 2005 Past Questions and Answers

Question 46:

• JAMB 2005

Metalliods are also referred to as

A. Semi-metals
B. Metals
C. Colliods
D. Non-metals

Question 47:

• JAMB 2005

The ores that can be concentrated by flotation are

A. Nitride ores
B. Sulphide ores
C. Oxide ores
D. Non-metals

Question 48:

• JAMB 2005

The property used in the industrial preparation of nitrogen and oxygen from air is

A. Rate of diffusion
B. Density
C. Boiling point
D. Solubility

Question 49:

• JAMB 2005

In a flame test for calcium, the flame appears

A. Green when viewed through a blue glass
B. Blue when viewed through a blue glass
C. Orange -red when viewed through a blue glass
D. Brick-red when viewed through a blue-glass

Question 50:

• JAMB 2005

Which of the following alloys contain iron?

A. Duralumin and steel
B. Brass and bronze
C. Steel and permalloy
D. Soft solder and duralumin