An element X burns with a brilliant blue flame in the presence of oxygen ot form Y. Y truns acidified potassium dichromate paper green. Identify X and Y.

An element X burns with a brilliant blue flame in the presence of oxyg

1.	An element X burns with a brilliant blue flame in the presence of oxygen ot form Y. Y truns acidified potassium dichromate paper green. Identify X and Y.
Answer» Nitrogen nitrogen dioxide Sulphur, sulphur dioxide Phosphorus, phosphorus pentoxide Sodium, sodium oxide Solution :Sulphur is the non-metal which burns with a blue COLOURED flams. `SO_(2)` TURNS orange coloured `K_(2)Ce_(2)O_(7)` green due to the formation of `CR(SO_(4))_(3)`.