A gas evolved with effervescence on treating a salt with dil. HCl may – InterviewSolution

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1.	A gas evolved with effervescence on treating a salt with dil. HCl may be CO_(2) or SO_(3). How will you distinguish between them?
Answer» Solution :a. `SO_(2)` has a PUNGENT burning sulphur SMELL, WHEREAS `CO_(2)` is ODOURLESS. ltbr. (b). `SO_(2)` durns potassium dichromate paper GREEN whereas `CO_(2)` does not.

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