CIE iGCSE Co-Ordinated Science C9.3 Alloys and their properties Exam Style Questions Paper 1
Question
Duralumin and magnalium are alloys used in the manufacture of aircraft.
They both contain aluminium and another metallic element.
The alloys are made up of ……1…… of each element.
They are used because they are ……2…… than the pure metals.
Which words complete gaps 1 and 2?
▶️Answer/Explanation
Ans :A
Question
Metal X is extracted from its ore by heating the ore with carbon.
Which statement explains why carbon is used?
(A) Carbon is a non-metal.
(B) Carbon is more reactive than X.
(C) Carbon reacts with oxygen in the air.
(D) Carbon is less reactive than X.
▶️Answer/Explanation
Ans: B
Question
Alloys are formed by dissolving one metal in another.
Alloys are ……1…… .
……2…… alloys conduct electricity.
Which words complete gaps 1 and 2?
▶️Answer/Explanation
Ans : C
Question
Which process is used to increase the hardness of a metal?
(A) Mix the metal with a gas.
(B) Mix the metal with another element.
(C) Mix the metal with a polymer.
(D) Mix the metal with its ore.
▶️Answer/Explanation
Ans: B