What happens when hydrogen gas is passed over heated copper oxide $(CuO)$?
- ABlack coating on the surface turns blue.
- BBlack coating on the surface turns green.
- CBlack coating on the surface turns brown.
- DBlack coating on the surface turns white.
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Similar Questions
Giving chemical equations,answer the following:
$(a)$ What happens when copper is heated in air?
$(b)$ What happens when the product obtained in the above reaction is heated in hydrogen?
$(a)$ What happens when copper is heated in air?
$(b)$ What happens when the product obtained in the above reaction is heated in hydrogen?
Medium
View SolutionExplain the "Reduction" in terms of gain or loss of oxygen with two examples.
Difficult
View SolutionWhich is the oxidising agent in the following reaction?
$CuO(s) + H_2(g) \longrightarrow Cu(s) + H_2O(l)$
$CuO(s) + H_2(g) \longrightarrow Cu(s) + H_2O(l)$
Medium
View SolutionIdentify the reducing agent in the following reactions:
$(a)$ $4 NH_{3} + 5 O_{2} \longrightarrow 4 NO + 6 H_{2}O$
$(b)$ $H_{2}O + F_{2} \longrightarrow HF + HOF$
$(c)$ $Fe_{2}O_{3} + 3 CO \longrightarrow 2 Fe + 3 CO_{2}$
$(d)$ $2 H_{2} + O_{2} \longrightarrow 2 H_{2}O$
$(a)$ $4 NH_{3} + 5 O_{2} \longrightarrow 4 NO + 6 H_{2}O$
$(b)$ $H_{2}O + F_{2} \longrightarrow HF + HOF$
$(c)$ $Fe_{2}O_{3} + 3 CO \longrightarrow 2 Fe + 3 CO_{2}$
$(d)$ $2 H_{2} + O_{2} \longrightarrow 2 H_{2}O$
Medium
View SolutionWhy is a combustion reaction considered an oxidation reaction?
Easy
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