- Messages
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- Reaction score
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- Points
- 273
Reaction 1 involves addition of O2, whenever one substance is oxidised, another has to be reduced!http://www.xtremepapers.com/papers/CIE/Cambridge IGCSE/Chemistry (0620)/0620_s07_qp_1.pdf
QUESTION 16 WHY IS IT C BUT NOT B???????
IM GOING TO DO TERRIBLY IN THE EXAM!!!!!!!!!!!!!!!!!
Reaction 2 is also oxidisation!
In reaction 3, there is no oxidation or reduction, just water is added.
It is neither oxidation nor reduction as the oxidation state of the iodide ion is unchanged!ALSO QUESTION 22 WHY IS IT C BUT NOT D?
It is precipitation as lead (II) iodide formed is a yellow precipitate.
DON'T WORRY!