Group 7: The Halogens (OCR GCSE Chemistry A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What colour is chlorine gas?
What colour is chlorine gas?
Yellow-green
What is the physical state and colour of bromine at room temperature?
What is the physical state and colour of bromine at room temperature?
Orange-red liquid
What colour vapour does iodine produce?
What colour vapour does iodine produce?
Purple vapour
How does reactivity change as you move down Group 7?
How does reactivity change as you move down Group 7?
Reactivity decreases
How many electrons do Group 7 elements have in their outer shell?
How many electrons do Group 7 elements have in their outer shell?
7 electrons
Why does reactivity decrease down Group 7?
Why does reactivity decrease down Group 7?
Outer electrons are further from nucleus
What colour are metal halide salts formed from metal-halogen reactions?
What colour are metal halide salts formed from metal-halogen reactions?
White solids
Which halogen reacts most slowly with heated iron wool?
Which halogen reacts most slowly with heated iron wool?
Iodine
Why is chlorine added to drinking water and swimming pools?
Why is chlorine added to drinking water and swimming pools?
To kill bacteria
What is the main difference between an antiseptic and a disinfectant?
What is the main difference between an antiseptic and a disinfectant?
Disinfectant is stronger
Why are fluorides added to toothpaste?
Why are fluorides added to toothpaste?
To reduce dental decay
What are silver bromide and silver iodide used for?
What are silver bromide and silver iodide used for?
Photographic film