Alkanes
Overview
Alkanes are the simplest organic molecules - chains of carbon atoms bonded to nothing but hydrogen. They burn well, which makes them excellent fuels, but they are otherwise remarkably unreactive. Natural gas, petrol, and candle wax are all alkanes.
In this lesson you will learn the general formula for alkanes, why they are called saturated hydrocarbons, and how to draw and name the first five members of the series. You will also explore their combustion reactions and physical property trends.
Objectives
- Know the general formula for alkanes
- Explain why alkanes are classified as saturated hydrocarbons
- Understand how to draw the structural and displayed formulae for alkanes with up to five carbon atoms in the molecule, and to name the unbranched-chain isomers
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Alkanes. 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.
- The general formula for alkanes is: A) CnH2n B) CnH2n+2 C) CnH2n-2 D) CnHn+2 Answer: B
- Alkanes are described as saturated because they: A) Contain double bonds B) Dissolve in water C) Contain only single carbon-carbon bonds D) Are very reactive Answer: C
- The products of complete combustion of an alkane are: A) Carbon monoxide and water B) Carbon dioxide and water C) Carbon and water D) Carbon dioxide and hydrogen Answer: B
- Which alkane has 3 carbon atoms? A) Methane B) Ethane C) Propane D) Butane Answer: C
- As alkane chain length increases, the boiling point: A) Decreases B) Stays the same C) Increases D) Fluctuates Answer: C
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Practice Mock Questions
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