Cambridge IGCSE · Science - Combined (0653)

Chemistry of the environment: Practice Questions

5 multiple-choice questions marked as you go, and 3 written questions with worked solutions. All on Chemistry of the environment.

8 questions17 marksFree, no account

Question 1

1 mark

Which gas is a toxic air pollutant primarily produced by the incomplete combustion of carbon-containing fuels?

Question 2

1 mark

A scientist analyzes a sample of clean, dry air. The sample contains nitrogen, oxygen, and a small remainder of other gases.

What is the correct approximate percentage by volume of nitrogen and the main noble gas present in the remainder?

Question 3

1 mark

A student uses a test to confirm the presence of water in an unknown liquid. The student adds the liquid to a sample of anhydrous cobalt(II) chloride.

Which observation confirms that water is present?

Question 4

1 mark

Greenhouse gases contribute to global warming by interacting with thermal energy. Which statement correctly describes how carbon dioxide and methane affect the Earth's atmosphere?

Question 5

1 mark

Domestic water supplies undergo several treatment steps before being safe for use. A specific process is used to remove tastes and odours from the water.

Which substance is used for this purpose?

Question 6

3 marks

Explain how the greenhouse gases carbon dioxide and methane contribute to global warming by describing their interaction with thermal energy.

Write your answer out first, then check it against the worked solution.

Question 7

6 marks

Domestic water supply undergoes several treatment stages. Explain the specific purpose of sedimentation, the use of carbon, and chlorination in making water safe for human consumption.

Write your answer out first, then check it against the worked solution.

Question 8

3 marks

Describe the chemical test for the presence of water using anhydrous copper(II) sulfate and state the observed colour change.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, graded as you go.

Practice More