Question

Two Jars A and B contain equal volume of Hydrogen gas and chlorine gas are kept in dark room. Jar A is placed in diffused sunlight, whereas jar B is placed in direct sunlight. Describe all what you will observe.

Answer 1

• When Jar A containing an equal amount of hydrogen and chlorine gas are placed in diffused sunlight it combines slowly.

$\underset{\mathrm{Hydrogen}}{\underset{}{{\mathrm{H}}_2\left(\mathrm{g}\right)}}+\underset{\mathrm{Chlorine}}{\underset{}{{\mathrm{Cl}}_2}}\to \underset{\mathrm{Hydrogen}\mathrm{chloride}}{\underset{}{2\mathrm{HCl}}\left(\mathrm{g}\right)}$

• The pure chlorine gas can be combined with hydrogen to produce hydrogen chloride in the presence of ultraviolet light. As this formation of HCl is exothermic in nature so it is not carried out in direct sunlight as the HCl formed is protonated in the direct sunlight which can cause an explosion.

$\underset{\mathrm{hydrogen}}{\underset{}{{\mathrm{H}}_2\left(\mathrm{g}\right)}}+\underset{\mathrm{Chlorine}}{\underset{}{{\mathrm{Cl}}_2\left(\mathrm{g}\right)}}\to \underset{\mathrm{hydrogen}\mathrm{chloride}}{\underset{}{2\mathrm{HCl}\left(\mathrm{g}\right)}}$