CIE iGCSE Co-Ordinated Science C9.4 Reactivity series Exam Style Questions Paper 1
Question
Three metals X, Y and Z are added separately to water and to dilute hydrochloric acid.
The results are shown.
What is the order of reactivity of X, Y and Z?
▶️Answer/Explanation
Ans : B
Question
Pieces of four metals are added separately to test-tubes containing dilute hydrochloric acid.
The results are shown.
What is the order of reactivity of the metals from most to least reactive?
A 2 → 1 → 4 → 3
B 2 → 4 → 1 → 3
C 3 → 1 → 4 → 2
D 3 → 4 → 1 → 2
▶️Answer/Explanation
Ans : D
Question
Which statement explains why carbon is used in the extraction of copper from its ore?
(A) It is in Group IV of the Periodic Table.
(B) It is more reactive than copper.
(C) It is a non-metal.
(D) It forms a giant covalent molecule.
▶️Answer/Explanation
Ans: B
Question
Part of the reactivity series is shown.
aluminium
(carbon)
iron
lead
copper
gold
Which statement is correct?
A Aluminium can be extracted by heating its oxide with carbon.
B Gold forms an oxide which cannot be reduced by heating with aluminium.
C Iron cannot be extracted by heating its oxide with carbon.
D Lead can be extracted by heating its oxide with carbon.
▶️Answer/Explanation
Answer: D Lead can be extracted by heating its oxide with carbon.
Explanation: Lead is below carbon in the reactivity series, so it can be extracted by heating its oxide with carbon. Aluminium is above carbon, so it cannot be extracted by this method. Gold does not form a stable oxide, and iron can be extracted by heating its oxide with carbon.