Question

Q.Hydrous ferrous sulphate crystals are heated in a boiling tube for few seconds.Water droplets are seen in the inner sides of test tube and the colour of the crystals changes.On continuous heating colourless gas X with smell of burning Sulphur is evolved and a reversible Y is obtained.
(i)What is the colour of the crystals before and after mild heating?
(ii)Identify the gas X and the residue Y formed.
(iii)Write the balanced chemical equation for the above reaction.​​

Answer 1

Answer:

before burning green and after burning brown

ii) x is so2 and y is so3

iii) feso4. 7h20 when heated gives feso4+7h2o

when we overheat thi then

feso4 gives fe2o3+so2+so3

Answer 2

Answer:

Fe2o3+so2+so3 is the equation