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Which of the following gases is colourless, odourless and so...

Which of the following gases is colourless, odourless and soluble in potassium hydroxide solution?

A.

NO ₂

B.

SO ₂

C.

NH ₃

D.

CO₂

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Correct answer is D

CO2 (carbon dioxide) is a colorless and odourless gas and very soluble in KOH owning that it is an acidic gas.

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