Select from the list the gas that match the description given:
ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne
This gas is used as a reducing agent in reducing copper oxide to copper.

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Solution

Reduction of copper oxide $(CuO)$ :
Copper(II) oxide is converted to metallic copper using ammonia gas $({NH}_{3})$ .
The reaction is given below:
$3 CuO (s) + 2 {NH}_{3} (g) ⟶ 3 Cu (s) + 3 H_{2} O (l) + N_{2} (g) ↑$
Therefore, ammonia gas is used as a reducing agent in reducing copper oxide to copper.

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Select from the list the gas that match the description given:ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyneThis gas is used as a reducing agent in reducing copper oxide to copper.

Reduction of copper oxide CuO:Copper(II) oxide is converted to metallic copper using ammonia gas (NH3).The reaction is given below:3CuO(s)+2NH3(g)⟶3Cu(s)+3H2O(l)+N2(g)↑Therefore, ammonia gas is used as a reducing agent in reducing copper oxide to copper.

Select from the list the gas that match the description given:
ammonia, ethane, hydrogen chloride, hydrogen sulphide, ethyne
This gas is used as a reducing agent in reducing copper oxide to copper.