2g of ferrous sulphate crystals are heated in a dry boiling tube. 1-List any two observation 2-Name the type of reaction take place 3-Write the chemical reaction for equation
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1)colour change from green to brown
and smell of burning of sulphur.
2)Thermal decomposition reaction.
3)
2FeSo4-------> Fe2O3 + So2 + So3
and smell of burning of sulphur.
2)Thermal decomposition reaction.
3)
2FeSo4-------> Fe2O3 + So2 + So3
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Answer:
(i) Before heating, it is pale green.
After heating, it is brown or reddish brown.
Two observations are :
(a) Change in state and colour.
(b) Evolution of gas.
(ii) Decomposition reaction.
(iii) 2FeSO4(s) +Heat → Fe2O3(s) + SO2(g) + SO3(g)
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