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2 marksOxidation – Reduction Reactions

CSEC Chemistry · January 2016 · Paper 2 · Question 2(d)(i)

In Equation 2 on page 10, chlorine gas, Cl₂, has become a chloride ion, Cl⁻.

What is the change in oxidation number of Cl for the process?

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Other parts of this question

  1. 2(a)State ONE use of bleach in the laundering of clothing.[1 mark]
  2. 2(b)(i)Define, in terms of oxidation state, the term 'oxidizing agent'.[1 mark]
  3. 2(b)(ii)Define, in terms of oxidation state, the term 'oxidation'.[1 mark]
  4. 2(c)Deduce the oxidation number of Cl in the formula, NaClO.[3 marks]
  5. 2(d)(ii)Is this an oxidation or reduction process?[1 mark]
  6. 2(d)(iii)Describe a simple laboratory test for chlorine gas.[2 marks]
  7. 2(e)During one stage of the reaction, H₂O₂(aq) is converted to H₂O(l). Use the changes in oxidation number to determine whether this is an oxidation or reduction…[4 marks]

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