A rock sample was added to cold dilute HNO3. The gas evolved was passed into a solution of acidified K2Cr2O7 and the solution turned green. The sample contains? by Sunday | Oct 16 | Chemistry JAMB | 0 comments A. Cl– B. NO3– C. SO32- D. SO42- Correct Answer: Option C – SO32- Users Also Read These:Ethanol reacts with excess acidified K2Cr2O7 to produce?A few drops of concentrated HNO3 is added to an…The colour of phenolphthalein indicator in dilute HNO3 is?A gas was evolved when a sample of gastric juice…In a water culture experiment, the culture solution…