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?
(N/A) When copper is heated in air,it reacts with oxygen to form copper$(II)$ oxide,which is a black-colored substance.
Equation: $2Cu(s) + O_2(g) \xrightarrow{\text{Heat}} 2CuO(s)$
$(b)$ When the product obtained (copper$(II)$ oxide) is heated in hydrogen gas,it undergoes a reduction reaction to form copper metal and water.
Equation: $CuO(s) + H_2(g) \xrightarrow{\text{Heat}} Cu(s) + H_2O(l)$
The black coating turns brown as copper metal is formed.
Equation: $2Cu(s) + O_2(g) \xrightarrow{\text{Heat}} 2CuO(s)$
$(b)$ When the product obtained (copper$(II)$ oxide) is heated in hydrogen gas,it undergoes a reduction reaction to form copper metal and water.
Equation: $CuO(s) + H_2(g) \xrightarrow{\text{Heat}} Cu(s) + H_2O(l)$
The black coating turns brown as copper metal is formed.
Explore More
Similar Questions
Why is a combustion reaction considered an oxidation reaction?
Easy
View SolutionWhich process occurs at the cathode during the process of electrolysis?
Easy
View SolutionYou could have noted that when copper powder is heated in a china dish, the surface of copper powder becomes coated with black coloured substance.
$(i)$ Why has this black coloured substance formed?
$(ii)$ What is this black substance?
$(iii)$ Write the chemical equation of the reaction that takes place.
$(i)$ Why has this black coloured substance formed?
$(ii)$ What is this black substance?
$(iii)$ Write the chemical equation of the reaction that takes place.
Medium
View SolutionWhich is the reducing agent in the following reaction?
$MnO_{2}(s) + 4HCl(aq) \longrightarrow MnCl_{2}(s) + 2H_{2}O(l) + Cl_{2}(g)$
$MnO_{2}(s) + 4HCl(aq) \longrightarrow MnCl_{2}(s) + 2H_{2}O(l) + Cl_{2}(g)$
Medium
View SolutionIf copper metal is heated over a flame, it develops a coating. What is the colour and composition of this coating?
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo