IB Middle Years Programme (MYP) · Sciences

Introduction to organic chemistry: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Introduction to organic chemistry.

10 questions23 marksFree, no account

Question 1

1 mark

Which of the following is the correct structural formula for ethene?

Question 2

1 mark

A hydrocarbon molecule contains 5 carbon atoms and belongs to the alkane series. How many hydrogen atoms does it contain, and what is its IUPAC name?

Question 3

1 mark

Consider the complete combustion of propane (\(C_{3}H_{8}\)) in excess oxygen. What is the sum of the coefficients in the balanced chemical equation?
\(a C_{3}H_{8} + b O_{2} \rightarrow c CO_{2} + d H_{2}O\)

Question 4

1 mark

What is the general formula for the homologous series of alkanes?

Question 5

1 mark

Which of the following statements best describes a homologous series?

Question 6

2 marks

What is the functional group present in all alcohols, and what suffix is used to name them?

Write your answer out first, then check it against the worked solution.

Question 7

4 marks

Compare the structures of ethane and ethene. Which molecule contains a double bond, and how does this affect its chemical reactivity?

Write your answer out first, then check it against the worked solution.

Question 8

5 marks

Explain why isomers like butane and 2-methylpropane have the same molecular formula but different boiling points.

Write your answer out first, then check it against the worked solution.

Question 9

3 marks

Organic Chemistry Basics
(a) Define the term 'homologous series'.
(b) State two characteristics that members of the same homologous series share, other than having the same general formula.

Write your answer out first, then check it against the worked solution.

Question 10

4 marks

Isomerism is a key concept in organic chemistry.
(a) Draw and name two structural isomers of butane, \(C_{4}H_{10}\).
(b) Explain why the boiling point of the branched isomer is lower than that of the straight-chain isomer.

Write your answer out first, then check it against the worked solution.

* The content provided by thinka is generated by AI and may not always be accurate or up-to-date. Please use it as a supplementary resource and verify with official materials.

You've seen the model answer. Now get yours marked.

This page can show you how a good answer looks. It cannot tell you what your answer was missing. thinka marks your written work against the real mark scheme in about 15 seconds.

Get My Answers Marked Back to the notes

Want more questions like these? Get a fresh set on this topic, graded as you go.