CIE iGCSE Co-Ordinated Science C8.5 Noble gases Exam Style Questions Paper 1
Question
An airship containing an unreactive gas floats in air, as shown.
Which gas is used to fill the airship?
A carbon dioxide
B helium
C hydrogen
D nitrogen
▶️Answer/Explanation
Ans :B
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
Ans : A
Question
Filament lamps require an inert atmosphere.
Which gas is used to fill these lamps?
(A) argon
(B) helium
(C) hydrogen
(D)) oxygen
▶️Answer/Explanation
Ans: A
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