M/J 2009 Chemistry

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Ismail Breiwish said:
It's paper 1, but this question is one that I don't understand. Variant paper 1, Question 18.)

Thanks in advance,
Ismail

Aww, I wasn't diligent enough. I didn't notice that the heading for the 3rd reaction was O2. I assumed that all columns referred to the nitrogen.
 
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ok...it says wat happens to the REACTANTS!!so we jst look at the reactants (not the products)
N2 is oxidised as it gained oxygen
NO is also oxidied as it gained oxygen to become NO2
And O3 is reduced as it lost an oxygen atom to become 02

so its (B)
:)
 
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( B ) because the N2 gained two oxygens so it's oxidation
the 2NO gained another two oxygen so it's also oxidation
but the last one is reduction because it was O3 then it's O2 so it lost oxygen.
 
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