Joanna van Dyk
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Some mixed exam-like Qs

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Joanna van Dyk
Created by Joanna van Dyk almost 9 years ago
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Gases

Gases

Question 1 of 7

1

Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2).

What is the equation for this reaction?

Select one of the following:

  • 2H2O2 = O2 +2H2O

  • H2O2 = 2O + H2

  • 2H2O2 + CO2 = HCO3 + H2 + H2O

Explanation

Question 2 of 7

1

Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2).

What is a suitable catalyst for this reaction?

Select one of the following:

  • Manganese oxide

  • Phosphorus

  • Sulphur Dioxide

  • Lead Nitrate

Explanation

Question 3 of 7

1

Oxygen can be produced by the decomposition of hydrogen peroxide (H2O2).

What is the percentage of oxygen in air at atmospheric pressure

Select one of the following:

  • 21%

  • 78%

  • 0.04%

  • 1%

Explanation

Question 4 of 7

1

Other elements can combust in oxygen.

Write a balanced equation for the combustion of sulphur.

Select one of the following:

  • S + O2 = SO2

  • S + O2 = SO4

  • S + O2 = SO + H2O

Explanation

Question 5 of 7

1

SO2 dissolves in rainwater to form an acidic solution.

Select one of the following:

  • True
  • False

Explanation

Question 6 of 7

1

Fill the blank spaces to complete the text.

Write a balanced equation for the combustion of hydrogen:

H2 + O2 = 2

Explanation

Question 7 of 7

2

Select two uses for carbon dioxide:

Select one or more of the following:

  • fizzy drinks

  • fire extinguishers

  • sterilization

  • laughing gas

Explanation

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