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
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
Why are the elements in Group VIII of the Periodic Table unreactive?
A They are gaseous elements.
B They are monatomic elements.
C They have full inner shells of electrons.
D They have full outer shells of electrons.
▶️Answer/Explanation
Ans : D
Question
Why is argon used in lamps?
(A) It is heavier than air.
(B) It is lighter than air.
(C) It is reactive.
(D) It is unreactive.
▶️Answer/Explanation
Ans: D
Question
Which statement explains why argon is used to fill lamps?
(A) It is a gas.
(B) It is colourless.
(C) It is reactive.
(D) It is unreactive.
▶️Answer/Explanation
Ans: D
Question
What is a use for argon?
(A) as a catalyst
(B) in alloys
(C) in lamps
(D) neutralising chemical waste
▶️Answer/Explanation
Ans : C
Question
Which statements about the noble gas helium are correct?
1. It is unreactive.
2. Atoms of helium have two electrons in their outer electron shell.
3. Atoms of helium have incomplete outer electron shells.
4. The formula of helium gas is He2.
(A) 1 and 2 (B) 1 and 4 (C) 2 and 3 (D) 3 and 4
▶️Answer/Explanation
Ans: A