Question

During the experiment of heating Ferrous Sulphate crystals. Four students recorded their
observations as
1 Green colour of crystals changes to brown.
2 Brownish yellow gas is evolved.
3 Blue colour of crystals changes to green.
4 Smell of burning sulphur.
Which of the above observation is correct?
(1 Point)​

Answer 1

the option one is correct the colour of ferrous sulphate is green

Answer 2

Answer:

Option 1 and 4 are the correct answer