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
41–50 of 374 · Normal
Question 41
2 marks · Normal
Answer and see the solution →State the colour change you would observe when chlorine gas is bubbled through a solution of potassium iodide.
Question 42
3 marks · Normal
Answer and see the solution →The melting and boiling points of the halogens increase down the group.
Chlorine is a gas at room temperature (25 B0C) and boils at 76 B0C. Bromine is a liquid at room temperature and boils at 59 B0C. Iodine is a solid at room temperature and sublimes at 84 B0C.
(a)[2 marks]Use the information above to state the physical state (solid, liquid or gas) of each halogen at room temperature (7F25 B0C).
(b)[1 mark]Explain, using the relative molecular mass and forces present, why the melting and boiling points increase from chlorine to iodine.
Question 43
4 marks · Normal
Answer and see the solution →The halogens react with metals and can also displace each other from solutions of their salts.
(a)[1 mark]State what is meant by a displacement reaction involving the halogens.
(b)[1 mark]Write a word equation for the reaction between bromine and potassium iodide solution.
(c)[2 marks]Explain why chlorine can displace bromine from sodium bromide solution, but iodine cannot.
Question 44
2 marks · Normal
Answer and see the solution →State what you would observe when chlorine water is added to a solution of potassium iodide. Write the chemical equation for the reaction.
Question 45
4 marks · Normal
Answer and see the solution →A student investigates the reactivity of three halogens: chlorine, bromine and iodine, using solutions of their salts.
(a)[2 marks]Explain, with an equation, what happens when bromine solution is added to potassium iodide solution.
(b)[2 marks]The student adds iodine solution to potassium chloride solution. State and explain the observation.
Question 46
3 marks · Normal
Answer and see the solution →Explain why chlorine can displace bromine from potassium bromide solution, but bromine cannot displace chlorine from potassium chloride solution. In your answer, refer to the reactivity trend of halogens.
Question 47
4 marks · Normal
Answer and see the solution →The results below show the observed colour changes when halogen solutions are mixed with different potassium halide solutions.
Observed colour change when halogen solutions are added to potassium halide solutions. Added halogen solution Potassium halide solution Observation Chlorine (Cl2) Potassium bromide (KBr) orange Bromine (Br2) Potassium iodide (KI) brown Iodine (I2) Potassium chloride (KCl) no change (a)[1 mark]Which halogen is the most reactive? Give evidence from the table.
(b)[1 mark]Write a balanced chemical equation for the reaction between bromine solution and potassium iodide solution.
(c)[2 marks]Predict the result if chlorine solution is added to potassium iodide solution. Explain your answer.
Question 48
1 mark · Normal
Answer and check →Which mixture will result in a visible colour change, indicating a displacement reaction?
- A.Chlorine solution and potassium bromide solution
- B.Iodine solution and potassium chloride solution
- C.Bromine solution and potassium chloride solution
- D.Iodine solution and potassium bromide solution
Question 49
2 marks · Normal
Answer and see the solution →Write the balanced equation for the reaction between chlorine and potassium bromide. State the colour change seen during the reaction.
Question 50
4 marks · Normal
Answer and see the solution →A student investigates halogen displacement reactions.
(a)[1 mark]Describe what the student would see when bromine solution is added to potassium chloride solution.
(b)[1 mark]Explain your answer to part (a).
(c)[1 mark]Write a balanced equation for the reaction (if any) between iodine solution and potassium bromide solution.
(d)[1 mark]State the order of reactivity of chlorine, bromine and iodine.