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Atoms and reactions

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Question 122

Which of the following chemical equations does not represent a disproportionation reaction?

A

3HNO2(aq)→HNO3(aq)+2NO(g)+H2O(l)3\text{HNO}_2(\text{aq}) \rightarrow \text{HNO}_3(\text{aq}) + 2\text{NO}(\text{g}) + \text{H}_2\text{O}(\text{l})3HNO2​(aq)→HNO3​(aq)+2NO(g)+H2​O(l)

B

IO3−(aq)+5I−(aq)+6H+(aq)→3I2(aq)+3H2O(l)\text{IO}_3^-(\text{aq}) + 5\text{I}^-(\text{aq}) + 6\text{H}^+(\text{aq}) \rightarrow 3\text{I}_2(\text{aq}) + 3\text{H}_2\text{O}(\text{l})IO3−​(aq)+5I−(aq)+6H+(aq)→3I2​(aq)+3H2​O(l)

C

4KClO3(s)→3KClO4(s)+KCl(s)4\text{KClO}_3(\text{s}) \rightarrow 3\text{KClO}_4(\text{s}) + \text{KCl}(\text{s})4KClO3​(s)→3KClO4​(s)+KCl(s)

D

Cl2(aq)+2NaOH(aq)→NaCl(aq)+NaClO(aq)+H2O(l)\text{Cl}_2(\text{aq}) + 2\text{NaOH}(\text{aq}) \rightarrow \text{NaCl}(\text{aq}) + \text{NaClO}(\text{aq}) + \text{H}_2\text{O}(\text{l})Cl2​(aq)+2NaOH(aq)→NaCl(aq)+NaClO(aq)+H2​O(l)

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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