Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
The properties of oxides
19 practice questions
Practice questions
11–19 of 19
Question 11
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 12
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 13
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 14
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 15
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 16
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.
Question 17
2 marks · Hard
Answer and see the solution →Calcium reacts with oxygen to form calcium oxide. State whether calcium oxide is acidic, basic or neutral. Explain your answer.
Question 18
5 marks · Hard
Answer and see the solution →This question is about the nature of oxides.
(a)[2 marks]Complete the table by identifying whether each oxide is acidic, basic or neutral.
Oxide Type (acidic, basic or neutral) Sodium oxide Carbon dioxide (b)[3 marks]Explain your answers for both oxides, referring to the type of element each oxide is formed from.
Question 19
2 marks · Hard
Answer and see the solution →When phosphorus is burned in oxygen, phosphorus(V) oxide is formed. State whether phosphorus(V) oxide is acidic, basic or neutral. Give a reason for your answer.