Question

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Answer 1

Answer:

1)hydrogen 2)copper

Explanation:

Answer 2

Answer:

$CuO + H_{2} \ -> Cu + H_{2}O$

In CuO Oxidation State of Cu is +2 and in H2 Oxidation State of H is  0

Now After Reaction Oxidation of Cu is 0 and H is +1

1. Hydrogen (H)
2. Copper (Cu)
3. Copper Oxide (CuO)
4. Hydrogen Molecule (H2)