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Identify the substances that are oxidise...

Identify the substances that are oxidised and the substances that are reduced in the following reactions.
(i) `4Na(s)+O_(2)(g)rarr2NaO(s)`
(ii) `CuO(g) +H_(2)(g) rarr Cu(s) +H_(2)O(l)`

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(i) Substance oxidised : `Na`, Substnace reduced : `O_(2)`
(ii) Substance oxidised : `H_(2)` : Substance reduced : `CuO`
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LAKHMIR SINGH & MANJIT KAUR-CHEMICAL REACTIONS AND EQUATIONS -Exercise
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