When solid Y is treated with dil HCI produces brisk effervescence with the liberation of colourless,odourless gas that turns limewater milky. Whichof the following could be solid Y?

When solid Y is treated with dil HCI produces brisk effervescence wi

1.	When solid Y is treated with dil HCI produces brisk effervescence with the liberation of colourless,odourless gas that turns limewater milky. Whichof the following could be solid Y?
Answer» The salt is SULPHITE. When the salt reacts with sulphuric acid, sulphur dioxide GAS is liberated.SO 32− +2H + →SO 2 ↓+H 2 OThis gas when reacts with lime water, turns milky.SO 2 +Ca(OH) 2 →CaSO 3 ↓(white)+H 2 OAnd, when it reacts with an acidified orange colored potassium dichromate, solution turns green due to the FORMATION of CHROMIUM ions.Cr 2 O 72− +2H + +3SO 2 →Cr 3+ +3SO 42− +H 2 O