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Physical Properties of Sulphur Dioxide
Sulphur dioxide is a dull gas.
It has a very pungent smell. Its odour resembles smoulder sulphur.
It is one of the most straightforward gases to melt. This is because it consolidates at room temperature under a pressure of 2 atm.
Chemical Properties of Sulphur Dioxide
It is an acidic oxide.
It is readily dissolvable in water.
Sulphur dioxide breaks up in water and gives out sulphurous acid.
SO2 + H2O → H2SO3
Sulphur dioxide Water Sulphurous acid
It reacts vigorously with sodium hydroxide solution and forms sodium sulphite.
SO2 + 2NaOH → Na2SO3 + H2O
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