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Atoms and reactions

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Question 51

Which reaction is a redox reaction?

A

KOH+HNO3→KNO3+H2O\text{KOH} + \text{HNO}_3 \rightarrow \text{KNO}_3 + \text{H}_2\text{O}KOH+HNO3​→KNO3​+H2​O

B

BaCl2+Na2SO4→BaSO4+2NaCl\text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow \text{BaSO}_4 + 2\text{NaCl}BaCl2​+Na2​SO4​→BaSO4​+2NaCl

C

CaCO3+2HCl→CaCl2+H2O+CO2\text{CaCO}_3 + 2\text{HCl} \rightarrow \text{CaCl}_2 + \text{H}_2\text{O} + \text{CO}_2CaCO3​+2HCl→CaCl2​+H2​O+CO2​

D

MnO2+4HCl→MnCl2+2H2O+Cl2\text{MnO}_2 + 4\text{HCl} \rightarrow \text{MnCl}_2 + 2\text{H}_2\text{O} + \text{Cl}_2MnO2​+4HCl→MnCl2​+2H2​O+Cl2​

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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