Cambridge International AS Level · Chemistry (9701)

An introduction to AS Level organic chemistry: Practice Questions

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

10 questions25 marksFree, no account

Question 1

1 mark

Which of the following terms correctly describes a compound that is made up of carbon and hydrogen atoms only?

Question 2

1 mark

Ethene, \(C_{2}H_{4}\), is a planar molecule. Which statement correctly describes the bonding and hybridization of the carbon atoms in ethene?

Question 3

1 mark

Which of the following statements correctly describes the bonding in a molecule of ethyne, \(C_{2}H_{2}\)?

Question 4

1 mark

Which statement correctly defines a free radical?

Question 5

1 mark

An organic compound is found to have the molecular formula \(C_{4}H_{8}O_{2}\). When treated with sodium carbonate, it produces bubbles of a gas. How many structural isomers of this compound are carboxylic acids?

Question 6

2 marks

State what is represented by a curly arrow in an organic reaction mechanism.

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

Question 7

3 marks

State the hybridisation of the two non-ring carbon atoms in prop-1-ene: the carbon atom in the methyl group (\(-CH_3\)) and the carbon atom in the \(=CH_2\) group.

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

Question 8

6 marks

A molecule of 2-bromobutane is reacted with aqueous sodium hydroxide. Identify the mechanism of this reaction and explain if the product will show optical activity if a single enantiomer of 2-bromobutane is used.

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

Question 9

4 marks

Consider the organic compound with the structural formula \(\text{CH}_3\text{CH}_2\text{CH(OH)CH}_3\).

(a) State the systematic IUPAC name for this compound.
(b) Classify this alcohol as primary, secondary, or tertiary.
(c) State the type of stereoisomerism exhibited by this compound and explain why it occurs in this molecule.

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

Question 10

5 marks

An organic compound P contains only carbon, hydrogen, and oxygen. The mass spectrum of P shows a molecular ion peak, \(M^{+}\), at \(m/e = 74\). In its infrared spectrum, a strong absorption is seen at approximately \(1720 \text{ cm}^{-1}\) and a broad absorption is absent in the \(3200\text{--}3600 \text{ cm}^{-1}\) range.

(a) Use the \(m/e\) value to deduce the molecular formula of P.
(b) Identify the functional group present in P based on the IR data.
(c) Draw the displayed formulas and provide the systematic names for the two possible structural isomers of P that are functional group isomers of each other.

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, marked as you go.