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Question

In the preparation of copper sulfate from copper, oxidation state of copper changes from:

A
+1 to +2
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B
0 to +2
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C
+2 to +1
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D
+2 to 0
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Solution

The correct option is D 0 to +2

Cu(g)+H2SO4(l)CuSO4(aq)+SO2(g)+2H2O(l)

In elemental state oxidation state of copper is zero, and in CuSO4 it is Cu+2 and SO24.


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