Question

What happens when sulphur dioxide gas is passed in excess in lime water?​

Answer 1

When SO2 is passed through water, we get an oily viscous liquid, which is less corrosive in nature. ... When sulphur dioxide is passed through lime water lime water turns milky, due to formation of calcium sulphite.

SO2 + Ca(OH)2 -----> CaSO3 + H2O.

Note that Calcium sulphite is milky white in colour.

Answer 2

Answer:

When SO2 is passed through water, we get an oily viscous liquid, which is less corrosive in nature. When sulphur dioxide is passed through lime water lime water turns milky, due to formation of calcium sulphite. SO2 + Ca(OH)2 -----> CaSO3 + H2O. Note that calcium sulphite is milky white in colour.

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