Describe an activity to show a decomposition reaction in which light is used to decompose a reactant. Write the chemical equation of the reaction and state its one use.
(N/A) $(i)$ Take $2 \, g$ of silver chloride in a china dish.
(ii) Place this china dish in sunlight for some time.
(iii) Observe the colour of silver chloride after some time. Silver chloride turns grey in sunlight due to the decomposition of $AgCl$ into $Ag$ and $Cl_2$.
Chemical equation:
$2AgCl(s) \xrightarrow{\text{Sunlight}} 2Ag(s) + Cl_2(g)$
Use: This reaction is used in black and white photography.
(ii) Place this china dish in sunlight for some time.
(iii) Observe the colour of silver chloride after some time. Silver chloride turns grey in sunlight due to the decomposition of $AgCl$ into $Ag$ and $Cl_2$.
Chemical equation:
$2AgCl(s) \xrightarrow{\text{Sunlight}} 2Ag(s) + Cl_2(g)$
Use: This reaction is used in black and white photography.
Explore More
Similar Questions
On heating blue coloured powder of copper $(II)$ nitrate in a boiling tube,copper oxide (black),oxygen gas and a brown gas $X$ is formed.
$(a)$ Write a balanced chemical equation of the reaction.
$(b)$ Identify the brown gas $X$ evolved.
$(a)$ Write a balanced chemical equation of the reaction.
$(b)$ Identify the brown gas $X$ evolved.
Medium
View SolutionElectrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during electrolysis of water is
Medium
View SolutionWhen potassium iodide solution is added to a solution of lead $(II)$ nitrate in a test tube,a precipitate is formed.
$(i)$ Write a balanced chemical equation for this reaction.
$(ii)$ What type of reaction is this?
$(i)$ Write a balanced chemical equation for this reaction.
$(ii)$ What type of reaction is this?
Medium
View SolutionWhen a green iron salt is heated strongly, its colour finally changes to black and the odour of burning sulphur is given out.
$(a)$ Name the iron salt.
$(b)$ Name the type of reaction that takes place during the heating of iron salt.
$(a)$ Name the iron salt.
$(b)$ Name the type of reaction that takes place during the heating of iron salt.
Medium
View SolutionWrite true or false for the following statement: On heating the crystals of ferrous sulphate,the colour changes from green to grey.
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