Question

When hydrogen gas is passed over heated copper (11) oxide, copper and steam are formed. Write the balanced chemical equation for this reaction and state (i) the substance oxidized and (ii) the substance reduced in the reaction .

CBSE Class X Science SA 1 ( 2 marks)

Answer 1

CuO+H2--->Cu+H2O
CuO is reduced
H2 is oxidised

Answer 2

Answer:

CuO(s)+H2(g) --> Cu(s)+H2O(g)

Explanation:

it is a kind of redox /displacement reaction as H2 displaces CuO to form Cu and H2O. also hydrogen gas reduces the compound. here H2 is reducing agent and substance reduced is CuO.

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