Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

$\text{ICl}$ forms when $\text{Cl}_2$ and $\text{I}_2$ react with each other. $\text{Cl}_2 + \text{I}_2 \rightleftharpoons 2\text{ICl}$ $\text{ICl}$ then reacts in water. $5\text{ICl} + 3\text{H}_2\text{O} \rightarrow 5\text{HCl} + \text{HIO}_3 + 2\text{I}_2$ Which row is right?

  • Aoxidation number of I in ICl: $+1$; the iodine atoms are oxidised to form $\text{I}_2$
  • Boxidation number of I in ICl: $+1$; the iodine atoms are oxidised to form $\text{HIO}_3$
  • Coxidation number of I in ICl: $-1$; the chlorine atoms are reduced to form $\text{HCl}$
  • Doxidation number of I in ICl: $-1$; the iodine atoms are oxidised to form $\text{HIO}_3$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI