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Atoms and reactions

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Question 50

Sodium dithionite, Na2S2O4\text{Na}_2\text{S}_2\text{O}_4Na2​S2​O4​, is a powerful reducing agent used industrially in vat dyeing processes to reduce water-insoluble dyes like indigo into their soluble forms. What is the oxidation number of sulfur in sodium dithionite?

A

+4+4+4

B

+5+5+5

C

+3+3+3

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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