Quelpr
2 marksQualitative Analysis

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

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

Describe a simple laboratory test for chlorine gas.

The mark scheme is shown once you've answered.

Practise this question

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)(i)What is the change in oxidation number of Cl for the process?[2 marks]
  6. 2(d)(ii)Is this an oxidation or reduction process?[1 mark]
  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]

More practice: the rest of this paper · more Qualitative Analysis questions · all CSEC Chemistry past papers