WAEC - Chemistry (2001 - No. 20)
What is oxidized in the reaction represented by the following equation? 3CU + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O
Oxygen
Hydrogen
Nitrogen
Copper
Giải thích
Copper is oxidized because there is an increase of oxidation number from 0 (LHS) to +2 (RHS).