4253833
Description
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
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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
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Phosphorus
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Sulphur Dioxide
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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%
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78%
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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
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S + O2 = SO4
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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
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sterilization
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laughing gas
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