Which of the following reagents can be u...

Which of the following reagents can be used to distinguish between `SO_(2) and CO_(2)`?

Lime water

`BaCl_(2)` solution

`H_(2)O_(2)+BaCl_(2)` solution+dil. HCl

Acidified dichromate paper

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The correct Answer is:

C, D

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Sodium sulphite (Na_(2)SO_(3)) is added to meat as a preservative. The presence of Na_(2)SO_(4) can be detected by adding dil. H_(2)SO_(4) when the pungent smelling gas evolved turns the lime water milky. The gas evolved was detected as sulphur dioxide. The SO_(2) " to "SO_(4)^(2-) in titration. SO_(2)+2H_(2)O+I_(2) to 4H^(+)+SO_(4)^(2-)+2I^(-) In order to check the results of titration, excess barium chloride is added to the final solution. The resulting precipitate is collected and weighed. Q. SO_(2) and CO_(2) both lime water milky. Which of the following reagent can be used to distinguish these two gases? (I) K_(2)Cr_(2)O_(7)"/"H_(2)SO_(4) (II) KMnO_(4)"/"H^(+) (III) I_(2) solution

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