. How will you prove that

the oxide formed by sulfur is acidic in nature

Part 1:Litmus paper test

• Acid - Turns litmus paper from blue to red
• Base - Turns litmus paper from red to blue

Part 2: Flame Test

• When sulfur is burned in an oxygen jar, it produces sulfur dioxide in the form of a dazzling blue flame.
• The given reaction is:
• $\underset{\mathrm{Sulphur}}{\mathrm{S}\left(\mathrm{s}\right)}+\underset{\mathrm{Oxygen}}{{\mathrm{O}}_2\left(\mathrm{g}\right)}\to \underset{\mathrm{Sulphur}\mathrm{Dioxide}}{{\mathrm{SO}}_2\left(\mathrm{g}\right)}$

Part 3: Reaction with water

• Sulfur dioxide gas combines with water to generate sulfurous acid, it turns moist blue litmus paper red.
• As a result, it has an acidic character.
• $\underset{\mathrm{Dioxide}}{\underset{\mathrm{Sulphur}}{{\mathrm{SO}}_2\left(\mathrm{g}\right)}}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{Sulphurous}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_3\left(\mathrm{aq}\right)}$