OCR Twenty First Century Chemistry
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Which chemicals make up air, and which ones are pollutants? How do I make sense of data about air pollution? 1 Quiz
What chemical reactions produce air pollutants? What happens to these pollutants in the atmosphere? 4 Quizzes
How do we measure the properties of materials and why are the results useful? 1 Quiz
Why is crude oil important as a source of new materials such as plastics and fibres? 1 Quiz
Where does salt come from and why is it so important? 2 Quizzes
Why do we need chemicals such as alkalis and chlorine and how do we make them? 8 Quizzes
What can we do to make our use of chemicals safe and sustainable? 1 Quiz
What are the patterns in the properties of elements? 5 Quizzes
How do chemists explain the patterns in the properties of elements? 9 Quizzes
How do chemists explain the properties of compounds of Group 1 and Group 7 elements? 1 Quiz
What types of chemicals make up the atmosphere? 5 Quizzes
What types of chemicals make up the Earth’s lithosphere? 1 Quiz
How can we extract useful metals from minerals? 6 Quizzes
Chemicals and why we need them 10 Quizzes
Planning, carrying out and controlling a chemical synthesis 2 Quizzes
Green chemistry 8 Quizzes
Alcohols, carboxylic acids and esters 2 Quizzes
Energy changes in chemistry 46 Quizzes
Reversible reactions and equilibria 2 Quizzes