2 L of hydrogen and 2.5 L of chlorine are allowed react in diffused light. Write the volume composition of the component gases after reaction.

Explanation

Reaction between and chlorine leading to the production of hydrogen chloride is given as
`H_(2)+Cl_(2)rarr2HCl`
`{:("1 vol","1 vol","2 vol","Gay - Lussac.s volumes"),(2,2.5L,0L,"at start"),(0,0.5L,4L,"after the reaction"):}`
The volume of the mixture is 4. 5L
Volume of unreacted `Cl_(2)=0.5L`
Volume of `HCl` produced = 4 L