Question

A student took a pale yellow substance X in a test tube and heated it over a flame of a burner, a brown coloured residue Y was formed along with the evolution of two gases with the burning smell of Sulphur. Identify X and Y

Answer 1

Reaction is :
in this reaction, the green colour of ferrous sulphate changes to brown due to the formation of ferric oxide. A smell of burning sulphur is obtained due to the formation of Sulphur dioxide gas.

Answer 2

here is the answer...hope u found it helpful