Question

How can we test the presence of so2 and so3 gas in a solution

Answer 1

they are colourless and have a characteristic pungent smell
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Answer 2

We can test the presence of $SO2$ and $SO3$ in a gas solution by passing it from the water.

Definition of sulphur dioxide and sulphur trioxide :

Sulphur dioxide - $(SO2)$

• The chemical compound sulphur dioxide, often known as sulphur dioxide, has the formula $SO2$.
• It's a poisonous gas that gives off the odour of burned matches.

Sulphur trioxide - $(SO3)$

• The chemical molecule $SO3$ stands for sulphur trioxide.
• Sulfur oxide has been called "unquestionably the most important economically."

Explanation -

• We can detect the presence of  $SO2$ and $SO3$ in a gas solution by passing it through water, as it reacts with the water and turns it acidic, similar to acid rain.
• We can now determine whether the acid is sulphuric or sulphurous.

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