Introduction
Overview
Organic chemistry is the study of carbon-based compounds, and it underpins everything from the fuels that power transport to the plastics in your phone case. Understanding how organic molecules are named, drawn and grouped into families is the foundation for every topic that follows in this section.
In this lesson you will learn how to represent organic molecules using five different types of formula, explore the concept of homologous series and functional groups, identify isomers, and classify organic reactions into three categories. These are core skills tested repeatedly across the Edexcel papers.
Objectives
- Know that a hydrocarbon is a compound of hydrogen and carbon only
- Understand how to represent organic molecules using empirical, molecular, general, structural and displayed formulae
- Know what is meant by the terms: homologous series, functional group and isomerism
- Understand how to name compounds using IUPAC nomenclature
- Understand how to write the possible structural and displayed formulae of an organic molecule given its molecular formula
- Understand how to classify reactions of organic compounds as substitution, addition and combustion
Mind map
This topic is mapped out so you can see how the ideas connect.
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Flashcards
Quick recall practice on the facts this topic is tested on.
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Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Introduction. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Which of the following is a hydrocarbon? A) CH3OH B) C2H6 C) CO2 D) CH3COOH Answer: B
- What is the general formula for alkenes? A) CnH2n+2 B) CnH2n C) CnH2n-2 D) CnH2n+1OH Answer: B
- Compounds with the same molecular formula but different structural formulae are called: A) Isotopes B) Allotropes C) Isomers D) Polymers Answer: C
- Methane reacts with chlorine in the presence of UV light. This is an example of: A) Addition B) Combustion C) Polymerisation D) Substitution Answer: D
- Which formula type shows every atom and every bond in a molecule? A) Empirical B) Molecular C) Displayed D) General Answer: C
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Practice Mock Questions
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