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
331–340 of 869
Question 331
3 marks · Normal
Answer and see the solution →When 7.2 grams of magnesium ribbon are heated in steam, magnesium oxide and hydrogen gas are produced. The equation for the reaction is:
Calculate the volume (in dm) of hydrogen gas produced at room temperature and pressure (RTP) from this reaction. (Molar mass of Mg = 24 g/mol; the molar volume of a gas at RTP = 24 dm/mol)
Question 332
5 marks · Hard
Answer and see the solution →The table shows a list of four metals. Each can be added to a beaker of cold water. For each metal, describe what you would observe, and name the gas produced.
(a)[2 marks]Potassium is added to cold water.
(b)[1 mark]Sodium is added to cold water.
(c)[1 mark]Calcium granules are added to cold water.
(d)[1 mark]Lithium is added to cold water.
Question 333
2 marks · Hard
Answer and see the solution →Iron reacts with steam to form a black solid and hydrogen gas. State the name and chemical formula of the black solid formed.
Question 334
1 mark · Easy
Answer and see the solution →When magnesium reacts with dilute hydrochloric acid, what gas is produced?
Question 335
3 marks · Easy
Answer and see the solution →(a)[1 mark]A student adds a piece of zinc to dilute hydrochloric acid. State one observation she might make.
(b)[2 marks]What test could be used to confirm the identity of the gas produced? State the result.
Question 336
2 marks · Easy
Answer and see the solution →A student uses 0.35 g of magnesium in a reaction with excess dilute hydrochloric acid. (Relative atomic mass, Mg = 24)
Calculate the number of moles of magnesium used. Give your answer to two decimal places.
Question 337
2 marks · Easy
Answer and see the solution →Explain, with reasons, why copper does not react when added to dilute hydrochloric acid, but magnesium reacts vigorously.
Question 338
3 marks · Easy
Answer and see the solution →The table shows the maximum temperatures reached when equal moles of different metals react with excess dilute hydrochloric acid.
Temperature changes for reactions of metals with acid Metal Initial temperature / °C Maximum temperature / °C Aluminium 18 29 Zinc 18 23 Iron 18 20 Copper 18 18 (a)[1 mark]Calculate the temperature change for zinc.
(b)[1 mark]Which metal was the least reactive? Use data to support your answer.
(c)[1 mark]Explain why the reaction with aluminium may need to be warmed before it proceeds quickly.
Question 339
3 marks · Easy
Answer and see the solution →(a)[1 mark]Give the general word equation for the reaction between a metal and a dilute acid.
(b)[2 marks]Potassium cannot safely be reacted with dilute acids in the laboratory. Explain why.
Question 340
1 mark · Easy
Answer and see the solution →State one observation that would indicate a metal is more reactive when it reacts with dilute hydrochloric acid compared to another metal.