state the separating technique used to separate Sulphur Dioxide gas from carbon dioxide dissolved in water

Solution:
Sulphur dioxide and carbon dioxide can be separated by liquefaction followed by fractional distillation.
Sulphur dioxide has a boiling point of -10°C (higher) while that of carbon dioxide is -78.6°C (lower). Thus upon fractional distillation carbon dioxide will evaporate first followed by sulphur dioxide
 

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Fractional distillation
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