Three compounds X, Y and Z were taken into three different laboratory vessels and they were carried out by a chemist in his car. The car caught fire due to short circuit and the chemist came out of th

Question

Three compounds X, Y and Z were taken into three different laboratory vessels 
and they were carried out by a chemist in his car. The car caught fire due to 
short circuit and the chemist came out of the car and noticed following 
observations :

Prashant Kotian · Accepted Answer

Correct answer: D. FeSO4.7H2O(Green) -Δ/-7H2O-> FeSO4(White from 2 moles) -300°C-> Fe2O3(Brown) + SO2↑ + SO3↑. 3SO3(g) -cool-> S3O9.

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