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Group 7 (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Group 7' from the broader topic Atomic Structure And The Periodic Table. The test is geared towards the AQA exam board style syllabus.
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Which halogen is a brown liquid at room temperature?
A student bubbles chlorine through an aqueous solution containing potassium iodide. Which colour change indicates iodine has been produced?
Which diatomic halogen is a pale yellow gas at room temperature and very toxic?
Why is chlorine gas used in small amounts to disinfect drinking water rather than bromine?
What happens to the colour of a solution if aqueous sodium bromide is treated with chlorine water?
Which of the following describes why halogens form negative ions (halide ions)?
Which of the following gives the correct order of halogens from most to least reactive?
Which test and result indicate the presence of chloride ions in a solution?
Which of the following is the correct trend for boiling points going down Group 7?
Which property explains why iodine sublimes (goes from solid to gas) when heated gently?
Which halogen is the most reactive oxidising agent under standard conditions?