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Question

In which of the following reaction (s) H2SO4 can't act as an oxidising agent?

A
C12H22O11H2SO4−−−12C+11H2O
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B
S+2H2SO43SO2+2H2O
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C
Cu+2H2SO4CuSO4+SO2+2H2O
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D
All of the above
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Solution

The correct option is A C12H22O11H2SO4−−−12C+11H2O
0Cu+H2SO4+2CuO+H2O+SO2
here H2SO4 is oxidising Cu thus acting as oxidant.
0S+2H2SO43+4SO2+2H2O here H2SO4 is oxidising S thus acting as oxidant.
C12H22O11H2SO4−−−12C+11H2O
But, in this reaction it is not acting as an oxidising agent. It is acting as an dehydrating agent. Hence option (a) is the correct answer.

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