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In copper turnings test, pieces of copper is added to a nitrate salt and heated with conc. `H_(2)SO_(4)` .In this reaction copper acts as

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In copper turnings test, pieces of copper is added to a nitrate salt and heated with conc. `H_(2)SO_(4)` .In this reaction copper acts as
A. oxidising agent
B. dehydrating agent
C. reducing agent
D. bleaching agent
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`NaNO_(3)+H_(2)SO_(4)rarrNaHSO_(4)+HNO_(3)`
`Cu+4HNO_(3)rarrCu(NO_(3))_(2)+2NO_(2)+2H_(2)O`
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