Cambridge IGCSE · Chemistry (0620)

Oxides: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Oxides.

10 questions25 marksFree, no account

Question 1

1 mark

Which of the following oxides is classified as a basic oxide?

Question 2

1 mark

According to the supplement syllabus, which statement correctly describes a chemical property of an amphoteric oxide?

Question 3

1 mark

The chemical properties of three oxides, P, Q, and R, are investigated. The results are shown below:

- Oxide P: Reacts with aqueous sodium hydroxide but not with dilute hydrochloric acid.
- Oxide Q: Reacts with both dilute hydrochloric acid and aqueous sodium hydroxide.
- Oxide R: Reacts with dilute hydrochloric acid but not with aqueous sodium hydroxide.

Which row correctly classifies these oxides?

Question 4

1 mark

Which type of element generally reacts with oxygen to form an acidic oxide?

Question 5

1 mark

Phosphorus is a non-metal located in Group V of the Periodic Table. What is the most likely nature of the oxide formed by phosphorus, such as \(P_4O_{10}\)?

Question 6

2 marks

Classify calcium oxide (\(CaO\)) and sulfur dioxide (\(SO_2\)) based on their chemical nature (acidic or basic), related to the metallic or non-metallic character of the elements they contain.

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Question 7

3 marks

Classify phosphorus(V) oxide (\(P_4O_{10}\)) as an acidic or basic oxide, and explain your answer based on the type of element it contains.

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Question 8

5 marks

Predict the pH range (greater than, less than, or equal to 7) of the solution formed when sulfur dioxide gas dissolves in water, and name the acid that is produced.

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Question 9

3 marks

Oxides are classified based on their reaction characteristics.

(a) Classify carbon dioxide ( $$ \text{CO}_2 $$ ) and calcium oxide ( $$ \text{CaO} $$ ) as either an acidic oxide or a basic oxide, relating your answer to whether the element forming the oxide is a metal or a non-metal.

(b) Describe the characteristic reaction when each of these oxides is mixed with water. Write a word equation for each reaction that occurs.

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Question 10

7 marks

Oxides are compounds formed when elements react with oxygen. Oxides are generally classified based on their reaction with acids and bases.

(a) Define the terms 'acidic oxide', 'basic oxide', and 'amphoteric oxide', giving a specific example for each definition.

(b) Aluminium oxide, $$ \text{Al}_2\text{O}_3 $$ , is an example of an amphoteric oxide. Write two balanced chemical equations to demonstrate its amphoteric nature. In one equation, show $$ \text{Al}_2\text{O}_3 $$ reacting with a strong acid, and in the second equation, show it reacting with a strong alkali (like sodium hydroxide solution).

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