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Ethanol is a type of alcohol that we drink.

Organic Chemistry 1

Revise GCSE Organic Chemistry: naming, homologous series, isomers, and key reactions of alkanes and alkenes. Use the topic notes, then try the quiz below.

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Fascinating Fact:

Functional groups are the parts of molecules that control their reactions, such as the double bond in alkenes. Identifying the functional group helps predict how a substance will behave.

In GCSE Chemistry, Organic Chemistry looks at carbon compounds and the patterns that help you predict properties and reactions. You will practise naming, identifying homologous series, comparing structures, and spotting isomers.

Key Terms

Hydrocarbon: A compound made only of hydrogen and carbon atoms.
Isomer: A compound with the same molecular formula as another, but a different structure.
Alkene: An unsaturated hydrocarbon containing at least one carbon-carbon double bond.

Frequently Asked Questions (Click to see answers)

What do I need to know for GCSE Organic Chemistry?

GCSE Organic Chemistry focuses on naming common families, understanding homologous series, identifying isomers, and learning typical reactions for alkanes, alkenes and alcohols.

How can I tell if a hydrocarbon is saturated or unsaturated?

A saturated hydrocarbon has only single carbon-carbon bonds. An unsaturated hydrocarbon has at least one double bond, which makes it more reactive in addition reactions.

What is the difference between addition and substitution in organic chemistry?

Addition joins atoms across a double bond to form one product. Substitution replaces an atom or group in a molecule with a different atom or group, forming a new compound.

Try These Related Quizzes

1 .

All organic compounds contain which element?

Sulfur

Carbon

Oxygen

Nitrogen

Organic chemistry is all about compounds of carbon

2 .

What type of bonds are formed between carbon and hydrogen atoms in organic molecules?

Covalent

Ionic

Metallic

Hydrogen

Carbon and hydrogen are both non-metals, so form covalent bonds

3 .

The alcohols are a family of organic compound that has a wide range of uses, including drinking. Which of the following alcohols is the only one that we drink?

Methanol

Ethanol

Propanol

Butanol

Ethanol also has other uses such as in biofuels

4 .

Which of the alcohols below has the molecular formula C₄H₉OH?

Methanol

Ethanol

Propanol

Butanol

Butane has 4 carbons, so does butanol

5 .

What is the general formula for alcohols?

C_nH_2nOH

C_nH_n+1OH

C_nH_2n+1OH

C_nH_2n+1O

With this general formula, you can work out the formula of other alcohols

6 .

The general formula for alkanes is C_nH_2n+2. If an alkane contains 6 carbon atoms, how many hydrogen atoms are present?

6 x 2 + 2 = 14

7 .

If an alkane contains 24 hydrogen atoms, how many carbon atoms does it have?

24 - 2 = 22 / 2 = 11

8 .

The general formula for alkenes is C_nH_2n. If an alkene contains 7 carbon atoms, there are how many hydrogen atoms in the compound?

7 x 2 = 14

9 .

If an alkene has 24 hydrogen atoms, how many carbon atoms does it contain?

24 / 2 = 12

10 .

If there are 8 carbon atoms in an alcohol molecule, how many hydrogen atoms are there?

2 x 8 + 1 + 1 (from OH) = 18

You can find more about this topic by visiting BBC Bitesize - More organic chemistry

Author: Kate Gardiner (Chemistry Educator & GCSE Quiz Writer)

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