Home / iGCSE / Coordinated Sciences / C9.2 Uses of metals Paper 1 |IITIAN ACADEMY

CIE iGCSE Co-Ordinated Science C9.2 Uses of metals Water Exam Style Questions Paper 1

CIE iGCSE Co-Ordinated Science Paper 1 - All Chapters

Question

Which property explains why aluminium is used to make food containers?

A. low density
B. high strength
C. resistant to corrosion
D. shiny

▶️ Answer/Explanation
Aluminium is resistant to corrosion because a thin layer of aluminium oxide forms on its surface, preventing further reaction with air and moisture. This makes it safe and suitable for food containers as it does not react with the food. Low density and shininess are not relevant to food storage, and high strength is less important for this application.
✅ Answer: (C)

Question

Which gas is produced when zinc reacts with dilute hydrochloric acid?
(A)  carbon dioxide
(B)  hydrogen
(C)  oxygen
(D) sulfur dioxide

▶️Answer/Explanation

Ans: B

Question

Which statement is not a reason why aluminium is used in aircraft manufacture?

A. It forms low density alloys.

B. It is malleable.

C. It is more reactive than iron.

D. It is resistant to corrosion.

▶️Answer/Explanation

Answer: C

Explanation: Aluminium is used in aircraft manufacture because it forms low-density alloys (A), is malleable (B), and is resistant to corrosion (D). However, its reactivity compared to iron (C) is not a reason for its use in aircraft. In fact, aluminium’s reactivity is managed through alloying and surface treatments.

Question

Which statement is not a reason why aluminium is used in aircraft manufacture?

A. It forms low-density alloys.

B. It is malleable.

C. It is more reactive than iron.

D. It is resistant to corrosion.

▶️Answer/Explanation

Answer: C. It is more reactive than iron.

Explanation: Aluminium is used in aircraft manufacture because it forms low-density alloys, is malleable, and is resistant to corrosion. Its reactivity is not a factor in its use for this purpose.

More CIE iGCSE Co-Ordinated Science Paper 1 Questions..
Scroll to Top