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Atoms and reactions

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Question 52

Which of the following chemical reactions represents a redox process?

A

AgNO3+KI→AgI+KNO3\text{AgNO}_3 + \text{KI} \rightarrow \text{AgI} + \text{KNO}_3AgNO3​+KI→AgI+KNO3​

B

K2Cr2O7+2KOH→2K2CrO4+H2O\text{K}_2\text{Cr}_2\text{O}_7 + 2\text{KOH} \rightarrow 2\text{K}_2\text{CrO}_4 + \text{H}_2\text{O}K2​Cr2​O7​+2KOH→2K2​CrO4​+H2​O

C

2FeCl3+H2S→2FeCl2+S+2HCl2\text{FeCl}_3 + \text{H}_2\text{S} \rightarrow 2\text{FeCl}_2 + \text{S} + 2\text{HCl}2FeCl3​+H2​S→2FeCl2​+S+2HCl

D

MgCO3→MgO+CO2\text{MgCO}_3 \rightarrow \text{MgO} + \text{CO}_2MgCO3​→MgO+CO2​

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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