CIE iGCSE Co-Ordinated Science C9.1 Properties of metals Exam Style Questions Paper 1
▶️ Answer/Explanation
Metals typically have high melting points (due to strong metallic bonds) and are good conductors of electricity (due to delocalised electrons). Non‑metals generally have low melting points and poor conductivity. Thus row A is correct.
✅ Answer: (A)
✅ Answer: (A)
▶️ Answer/Explanation
Sulfur is a non-metallic element, found in Group VI (not VII) of the Periodic Table.
It is a key raw material used industrially to manufacture sulfuric acid, \( H_2SO_4 \), via the Contact Process.
✅ Answer: (B)
It is a key raw material used industrially to manufacture sulfuric acid, \( H_2SO_4 \), via the Contact Process.
✅ Answer: (B)
▶️ Answer/Explanation
Reactive metals like zinc react with dilute acids to form a salt and hydrogen gas.
The reaction can be written as: \( \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \).
Carbon dioxide, oxygen and sulfur dioxide are not produced in this type of metal-acid reaction.
✅ Answer: (B)
The reaction can be written as: \( \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \).
Carbon dioxide, oxygen and sulfur dioxide are not produced in this type of metal-acid reaction.
✅ Answer: (B)
▶️ Answer/Explanation
Metals are generally malleable and good thermal/electrical conductors, matching rows A and B correctly.
Non-metals typically have low melting points and are generally poor conductors of electricity (with exceptions like graphite), matching row D.
Row C incorrectly links “non-metal” with “electrical conductor” as a general property, since non-metals are usually electrical insulators, making this the row that does not correctly link property to element type.
✅ Answer: (C)
Non-metals typically have low melting points and are generally poor conductors of electricity (with exceptions like graphite), matching row D.
Row C incorrectly links “non-metal” with “electrical conductor” as a general property, since non-metals are usually electrical insulators, making this the row that does not correctly link property to element type.
✅ Answer: (C)
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.