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

Sodium sulphite (Na_(2)SO_(3)) is added to meat as a preservative. The

1.	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
Answer» I, II, III correct I. III only correct II, III only correct III only correct Answer :A