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  • Topic: Hydrogen, PH, Acid dissociation constant
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  • Published : April 15, 2013
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Edexcel

A2
Chemistry
Questions and Answers

Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Unit 4 Rates, equilibria and further organic chemistry
Multiple-choice questions

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Structured questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Data question

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Unit 5 Transition metals, arenes and organic nitrogen chemistry Multiple-choice questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Structured questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Data question

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Edexcel A2 Chemistry Questions and Answers

© Philip Allan Updates

2

Introduction
The new Edexcel specification for A2 chemistry will be examined for the first time in 2010. This online resource contains samples of questions that might be asked in the examinations, together with the sort of answers that an A-grade candidate should give.There is also important advice about how examinations should be tackled and examples of common mistakes made by candidates who achieve low grades.These questions with their answers provide a useful resource in the important matter of examination technique, as well as helping to clarify chemical ideas. The questions given here are not balanced in each unit in terms of type of question or level of demand — they are not intended to typify real papers, only the sort of questions that could be asked.

The answers are those that examiners would expect from a grade-A candidate. They are not ‘model answers’ to be regurgitated without understanding. In answers that require more extended writing, it is the ideas that count rather than the form of words used. The principle is that correct and relevant chemistry, clearly and logically explained by the candidate, scores. Below you will find important advice on how to cope with answer papers that are marked online and some information on marking exams and how this differs from the marking of homework.

The new specification
There are some significant differences in question style between previous examinations and the new ones. You should bear these differences in mind if you have to work through past papers based on the previous specification.

Multiple-choice questions
The Unit 4 and 5 examinations each have 20 multiple-choice questions, and these should take you no more than 20 minutes. Examination papers are often written on the basis of approximately 1 mark a minute. Contemporary contexts

Chemistry questions often involve contexts, i.e. a particular area of chemistry is linked to an industrial process or a feature of everyday life. A context question may ask you to read a passage and then examine the underlying chemistry. It is not a simple comprehension exercise. The chemistry behind the context must be known, including any equations. It is in your answers to such questions that your quality of written communication will be assessed. Context questions appear in both A2 papers.

How science works (HSW)
Although billed as new in this specification, HSW is...
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