Question

when Furious sulphate crystals are heated the observation which helps us to identify it as a chemical change are (1) changes in colour and liberation of gases (2) changes in colour and librastion of heat (3) change in stste and librastion of heat (4) changes incolour and production of light plz say me the answer .........​

Answer 1

Answer:

1

Explanation:

a) as on heating the water of crystallization are lost and substance turns from Green to white

b) on heating it form ferrous oxide and SO2 and SO3 gases

Answer 2

Answer:

1 changes in colour and liberation of gas

Explanation:

green vitrol will become white upon loosing water of crystallisation and on further heating it will give oxides of sulphur which gives the smell of burning sulphur