Write down the equation for chemical reaction when hydrogen gas is passed over cupric oxide.

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Solution

When hydrogen is passed over heated black cupric oxide, the oxide is converted into dull red coloured metallic copper. Water also formed as one of the products. hence, cupric oxide is reduced to the metal and hydrogen is oxidised to water.

$C u O + H_{2} \to C u + H_{2}$

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Write down the equation for chemical reaction when hydrogen gas is passed over cupric oxide.

When hydrogen is passed over heated black cupric oxide, the oxide is converted into dull red coloured metallic copper. Water also formed as one of the products. hence, cupric oxide is reduced to the metal and hydrogen is oxidised to water. CuO + H2 → Cu + H2

When hydrogen is passed over heated black cupric oxide, the oxide is converted into dull red coloured metallic copper. Water also formed as one of the products. hence, cupric oxide is reduced to the metal and hydrogen is oxidised to water.

$C u O + H_{2} \to C u + H_{2}$