Suggest4 marksStandard
A student heats samples of hydrogen chloride, hydrogen bromide and hydrogen iodide in separate sealed tubes. State which of these hydrogen halides is the most thermally stable and explain why, in terms of bond strength.
CAIE A Level Chemistry 9701 · Group 17
Group 17: suggest question
How this question is marked
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Suggest means: Apply what you know to an unfamiliar situation. There may be more than one acceptable answer. Reason from the principle you have learned to the new context, and say which principle you are using.
More Group 17 questions
- 5 marks · A small volume of potassium chloride solution is added to aqueous silver nitrate. The precipitate formed is then treated with aqueous…
- 5 marks · Fluorine and iodine are halogens at opposite ends of Group 17. Compare the reactivity of fluorine and iodine as oxidising agents, their…
- 5 marks · Compare the reactions of chloride, bromide, and iodide ions with concentrated sulfuric acid. Include balanced chemical equations and…
- 4 marks · In the treatment of drinking water, chlorine gas is added to kill harmful bacteria. Explain, using relevant equations and oxidation…
- 4 marks · The table shows the boiling points and bond dissociation energies of chlorine, bromine and iodine. Halogen Colour Boiling point / °C Bond…
- 4 marks · Chlorine, bromine and iodine are molecular elements. Their boiling points are –34 °C, 59 °C and 184 °C respectively. Suggest, in terms of…
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.