CIE iGCSE Co-Ordinated Science C9.1 Properties of metals Exam Style Questions Paper 1
Question
Which row does not link a general physical property to the type of element?
▶️Answer/Explanation
Ans :A
Question
Which statement describes all metals?
A They break when hit with a hammer.
B They conduct electricity.
C They dissolve in water.
D They have high densities.
▶️Answer/Explanation
Answer: B
Explanation: All metals are good conductors of electricity due to the presence of free electrons.
Question
Substance Q is added to cold water. It floats on the water and hydrogen gas is made. What is Q?
A. iodine
B. lithium
C. magnesium
D. zinc
▶️Answer/Explanation
Answer: B
Explanation: Lithium is a highly reactive metal that floats on water and reacts with it to produce hydrogen gas. The reaction is: 2Li + 2H₂O → 2LiOH + H₂.
Question
Four properties of metals are listed. Which properties make aluminium suitable for use in cans containing drinks?
1. high melting point
2. low density
3. resistance to corrosion
4. conducts electricity
A. 1 and 2
B. 1 and 4
C. 2 and 3
D. 3 and 4
▶️Answer/Explanation
Answer: C. 2 and 3
Explanation: Aluminium is suitable for drink cans because it has a low density (making it lightweight) and is resistant to corrosion (preventing the contents from being contaminated).
Question
Some properties of aluminium are listed. Which properties make aluminium suitable for use as food containers?
1. conducts electricity
2. malleable
3. resistant to corrosion
A. 1, 2 and 3
B. 1 and 2 only
C. 1 and 3 only
D. 2 and 3 only
▶️Answer/Explanation
Answer: D
Explanation: Aluminium is malleable (can be shaped easily) and resistant to corrosion, making it suitable for use as food containers. Its ability to conduct electricity is not relevant to its use in food containers.
Question
Which statement describes the properties of solid metals?
A. They are brittle and good thermal conductors.
B. They are brittle and poor thermal conductors.
C. They are malleable and good thermal conductors.
D. They are malleable and poor thermal conductors.
▶️Answer/Explanation
Answer: C
Explanation: Solid metals are malleable (can be hammered into shapes) and are good thermal conductors due to the free movement of electrons.