Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Inorganic Chemistry
869 practice questions
Topics covered
- The Alkali Metals85 practice questions
- The Halogens86 practice questions
- Gases in the Atmosphere86 practice questions
- Reactivity Series163 practice questions
- Extraction and Uses of Metals128 practice questions
- Acids, Alkalis and Titrations83 practice questions
- Acids, Bases and Salt Preparations156 practice questions
- Chemical Tests68 practice questions
Practice questions
221–230 of 869
Question 221
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 222
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 223
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 224
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 225
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 226
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 227
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.
Question 228
1 mark · Easy
Answer and see the solution →State one effect that increased carbon dioxide in the atmosphere can have on our environment.
Question 229
3 marks · Easy
Answer and see the solution →A student heated zinc carbonate in a test tube to produce carbon dioxide gas.
(a)[1 mark]Write a balanced chemical equation, including state symbols, for this reaction.
(b)[1 mark]Name the type of reaction taking place when zinc carbonate breaks down on heating.
(c)[1 mark]State what you would observe inside the test tube as the reaction proceeds.
Question 230
2 marks · Easy
Answer and see the solution →In 1980, the average global concentration of carbon dioxide was 340 ppm (parts per million). In 2020, it increased to 415 ppm. Calculate the increase in CO2 concentration over this period.