Question

Identify the substances that are oxidised and the substances
that are reduced in the following reactions.
(i) 4Na(s) + 0,(g) → 2Na, O(s)
(ii) CuO(s) + H, (g) → Cu(s) + H,O(1)​

Answer 1

Answer:

(i) Sodium (Na) is oxidized to Na2O.

(ii) CuO (Copper oxide) is reduced to Cu, while H2 gas is oxidized to H2O.

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Answer 2

Answer:

Question (i) Na is oxidised and O2 is reduced

Question (ii) CuO is reduced And H2 is oxidised

Explanation:

Oxygen is added to Na due to which it is oxidised.

O2 is combine with electropositive element so it is reduced

CuO loses Oxygen due to which it is reduced

H2 combines with the oxygen due to which it is oxidised

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