Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
The properties of oxides
19 practice questions
Practice questions
1–8 of 8 · Normal
Question 1
2 marks · Normal
Answer and see the solution →State whether the following oxides are acidic or basic:
(a)[1 mark]Sodium oxide (Na2O)
(b)[1 mark]Carbon dioxide (CO2)
Question 2
4 marks · Normal
Answer and see the solution →The table below shows some oxides and whether they are formed from metals or non-metals.
(a)[0 marks]Some examples of oxides Oxide Element type Calcium oxide Metal Sulfur dioxide Non-metal Magnesium oxide Metal Carbon dioxide Non-metal (b)[2 marks]Complete the table by writing whether each oxide is acidic or basic.
(c)[2 marks]Explain why magnesium oxide and sulfur dioxide have different acid-base properties.
Question 3
3 marks · Normal
Answer and see the solution →Copper(II) oxide is formed by heating copper in oxygen.
Copper(II) oxide reacts with hydrochloric acid to form copper(II) chloride and water.
Explain, with reasons, why copper(II) oxide is classified as a basic oxide. Include in your answer what type of element forms this oxide, and what is observed when it is added to hydrochloric acid.
Question 4
4 marks · Normal
Answer and see the solution →Below is a table of some oxides and whether each produces an acidic, basic, or neutral solution when dissolved in water. Complete the table.
(a)[4 marks]Properties of some oxides in water Oxide Solution formed in water (acidic, basic or neutral) Iron(III) oxide Silicon dioxide Sodium oxide Nitrogen monoxide Question 5
1 mark · Normal
Answer and check →Which statement about metal oxides is correct?
- A.They are always acidic.
- B.They are usually basic.
- C.They are usually neutral.
- D.They react with water to form acidic solutions.
Question 6
2 marks · Normal
Answer and see the solution →Hydrogen burns in oxygen to form water. State whether water is an acidic, basic, or neutral oxide and give a reason for your answer.
Question 7
4 marks · Normal
Answer and see the solution →Sulfur burns in air to form sulfur dioxide.
(a)[1 mark]Write a balanced equation for the reaction of sulfur with oxygen.
(b)[1 mark]State whether sulfur dioxide is acidic, basic or neutral.
(c)[2 marks]Explain your answer to (b).
Question 8
3 marks · Normal
Answer and see the solution →When 4.8 g of magnesium is completely burned in excess oxygen, magnesium oxide (MgO) is formed. Magnesium oxide is then added to water, and only a small amount dissolves to form an alkaline solution.
Use the equation below and the information given to answer the following questions.
(Relative atomic masses: Mg = 24, O = 16)
(a)[3 marks]Calculate the maximum mass of magnesium oxide (MgO) produced when all of the 4.8 g of magnesium reacts. Show your working.