JAMB - Chemistry (1989 - No. 26)
Which of the following reactions is (are) feasible?
I Br (l) + 2CI\(_2\)(aq) → 2Br(aq) + CI\(_2\)(g)
ll 2 I (aq) + Br\(_2\)(L) → 2Br (aq) + I\(_2\)(s)
lll 2F (aq) + CI\(_2\)(g) → 2CI (aq) + F\(_2\)(g)
IV 2F(aq) + Br\(_2\)(l) → 2Br (aq) + F\(_2\)(g)
l
ll
l and lll
lll and lV
Explanation
After considering all the options, the only feasible reaction is with option II. This is because that is the only reaction where Bromine being more electronegative or more reactive than Iodine can displace Iodine to become an aqueous solution. In every other, Fluorine is more reactive than Chlorine and bromine, therefore, they cannot displace Fluorine, as seen in options III and IV. Also, Chlorine being more reactive than Bromine cannot be displaced by Bromine as seen in I. Hence the only option with the reaction being feasible is with II only.
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