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13020240
Gases
Description
Some mixed exam-like Qs
No tags specified
gcse chemistry
igcse chemistry
chenistry
edexcel
gases
igcse
Quiz by
Natharie Thotawatte
, updated more than 1 year ago
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Created by
Joanna van Dyk
over 8 years ago
Copied by
trisha Flynn
about 6 years ago
Copied by
Natharie Thotawatte
about 6 years ago
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Resource summary
Question 1
Question
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is the equation for this reaction?
Answer
2H2O2 = O2 +2H2O
H2O2 = 2O + H2
2H2O2 + CO2 = HCO3 + H2 + H2O
Question 2
Question
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is a suitable catalyst for this reaction?
Answer
Manganese oxide
Phosphorus
Sulphur Dioxide
Lead Nitrate
Question 3
Question
Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2). What is the percentage of oxygen in air at atmospheric pressure
Answer
21%
78%
0.04%
1%
Question 4
Question
Other elements can combust in oxygen. Write a balanced equation for the combustion of sulphur.
Answer
S + O2 = SO2
S + O2 = SO4
S + O2 = SO + H2O
Question 5
Question
SO2 dissolves in rainwater to form an acidic solution.
Answer
True
False
Question 6
Question
Write a balanced equation for the combustion of hydrogen: [blank_start]2[blank_end]H2 + O2 = 2[blank_start]H2O[blank_end]
Answer
2
H2O
Question 7
Question
Select two uses for carbon dioxide:
Answer
fizzy drinks
fire extinguishers
sterilization
laughing gas
Question 8
Question
Why does not Argon lose its electrons easily
Answer
It is because, the electrons in the outer shell are full
It is a non metal
It is too reactive
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