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Atoms and reactions

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Question 1
95%

What is the oxidation number of Cr\text{Cr}Cr in K2Cr2O7\text{K}_2\text{Cr}_2\text{O}_7K2​Cr2​O7​?

A

+3+3+3

B

+4+4+4

C

+5+5+5

D

+6+6+6

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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