Question

While performing an experiment a student observes that when he heats some green crystals in a boiling tube, the colour of the crystals changes to brown and a gas evolves which smells like burning sulphur. Interpret the observation and results.

Answer 1

the green crystals was ferrous sulphate when it was heated it decompose to form ferric oxide(brown in colour), sulphur trioxide and sulphur dioxide(smell like burning sulphur)

Answer 2

he heats some green crystals in a boiling tube, the colour ... Interpret the observation and results.