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
191–200 of 869
Question 191
1 mark · Easy
Answer and see the solution →Name the type of reaction that takes place when an element burns in oxygen.
Question 192
3 marks · Easy
Answer and see the solution →The apparatus below is used to burn phosphorus in air:
Apparatus for burning phosphorus in air (a)[1 mark]State the name of the gas in air that phosphorus reacts with when it is burned.
(b)[1 mark]Give one observation you would make when phosphorus burns in air.
(c)[1 mark]Name the compound formed when phosphorus combusts in oxygen.
Question 193
2 marks · Easy
Answer and see the solution →During the combustion of phosphorus in air, a student measures that the water level in the bell jar rises by 44 mL. The total original air volume in the jar was 210 mL. Calculate (to the nearest whole number) the percentage of oxygen in the original air sample.
Question 194
2 marks · Easy
Answer and see the solution →Explain why it is important to leave some phosphorus unreacted at the end of the experiment when finding the percentage of oxygen in air using phosphorus.
Question 195
1 mark · Easy
Answer and see the solution →State what you would observe when magnesium burns in pure oxygen.
Question 196
3 marks · Easy
Answer and see the solution →The diagram shows an experiment in which sulfur is burned in a bell jar filled with air over a trough of water.
(a)[1 mark]Describe what you would see when sulfur burns in oxygen.
(b)[1 mark]Write a word equation for the reaction of sulfur and oxygen.
(c)[1 mark]Explain why the water level inside the bell jar rises after burning sulfur, based on the changes taking place inside the jar.
Question 197
2 marks · Easy
Answer and see the solution →A student burns phosphorus in a bell jar containing 300 cm³ of air. After the reaction, the water level inside the bell jar rises by 63 cm³. Calculate the percentage of oxygen in air, based on these results. Give your answer to the nearest whole number.
Question 198
2 marks · Normal
Answer and see the solution →State what is meant by a combustion reaction. Give an example of a combustion reaction involving an element.
Question 199
4 marks · Normal
Answer and see the solution →The diagram shows an experiment in which a piece of magnesium ribbon is burned in a bell jar containing air, floating on water as described.
(a)[1 mark]State what you would observe when magnesium burns in the air inside the bell jar.
(b)[1 mark]Write a word equation for the combustion of magnesium in oxygen.
(c)[2 marks]Explain why the level of water rises inside the bell jar after the reaction.
Question 200
1 mark · Normal
Answer and check →Which of the following best describes what happens when an element combusts in oxygen?
- A.A new compound is formed and energy is released.
- B.The element turns into a gas without reacting.
- C.The element dissolves in oxygen.
- D.No change takes place.