OCR A Level Chemistry A
OCR A Level Chemistry A Group 2 and the Halogens Exam Questions
Free OCR A Level Chemistry A exam questions on Group 2 and the Halogens, with mark schemes. Covers group 2 reactions and trends, halogen reactivity, displacement and tests for halide ions.
Group 2 and the Halogens exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
OCR A Level Chemistry A H432 Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About OCR A Level Chemistry A Group 2 and the Halogens
This topic covers two important groups.
What you need to know
- Group 2 Reactions with water and oxygen, and trends.
- Uses Calcium hydroxide in agriculture and antacids.
- Halogens Reactivity trend and displacement reactions.
- Halide tests Silver nitrate and ammonia solutions.
Common mistakes in Group 2 and the Halogens
- Mixing precipitate colours.
- Saying reactivity decreases down group 2.
- Forgetting disproportionation of chlorine.
Try three Group 2 and the Halogens exam-style questions
1. State the colour of silver bromide. (1 mark)
Show the mark scheme answer
Cream.
2. Explain why reactivity increases down group 2. (2 marks)
Show the mark scheme answer
Atomic radius and shielding increase (1), so ionisation energy decreases (1).
3. Write the reaction of chlorine with water. (1 mark)
Show the mark scheme answer
Cl₂ + H₂O ⇌ HCl + HClO.
Group 2 and the Halogens FAQs
What does this topic cover?
Group 2 and halogen chemistry.
What is disproportionation?
An element is oxidised and reduced in the same reaction.
Why is chlorine added to water?
To kill bacteria.
Revise this topic with flashcards: OCR A Level Chemistry A H432 Flashcards, with mark scheme answers for Anki and Quizlet.
