Cold and dilute HNO3 reacts with Cu to give :
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NO
Reason — Cold and dilute HNO3 reacts with Copper and oxidises it to give Nitric oxide (NO)
3Cu + 8HNO3 ⟶ 3Cu(NO3)2 + 4H2O + 2NO
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Nitric acid is manufactured by :
The catalyst used in the manufacture of HNO3 is :
The brown ring test is used for the detection of :
Sulphur reacts with conc. HNO3 to give :