CIE iGCSE Co-Ordinated Science C9.1 Properties of metals Exam Style Questions Paper 2
Question
Which electronic structure belongs to a non-metallic element?
(A) 2
(B) 2,2
(C) 2,8,2
(D) 2,8,8,2
▶️Answer/Explanation
Ans: A
Question
Which row does not link a general physical property to the type of element?
▶️Answer/Explanation
Answer: C
Explanation: Non-metals are generally poor electrical conductors, so the statement that non-metals are electrical conductors is incorrect. Metals are typically malleable and good thermal conductors, while non-metals usually have low melting points.
Question
A gas is used in welding metals together at high temperatures. The gas is used to provide an inert atmosphere. What is the gas?
A) Argon
B) Carbon dioxide
C) Fluorine
D) Oxygen
▶️Answer/Explanation
Answer: A
Explanation: Argon is an inert gas and is commonly used in welding to create an inert atmosphere that prevents oxidation of the metals being welded.
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 reacts with cold water to produce hydrogen gas. It is also less dense than water, so it floats.