Compound A is thelightcrystalinesolid .IT gives thefollowing tests: i. ITdissolvesin dilute sulphuric acid, NO gas isproduced ii. A dropof MnO_(4) is added to theabovesolution .The pinkcolour disappears iii. Compound A is heatedstrongly .Gases B and C , with pungent smell , come out Abrown D is leftbehind iv . THe gas mixture (B and C) is passedinto a dchromate solution .The solutionturn green v. THe greensolutionfrom step (iv) gives a whiteprecipitateE with a soluttionof bariumnitrate . vi. Residue D fromstep (iii) isheated on charcoal in a reducingflame it gives a magnetic subsytance .Name thecompounds A,B,C, D and E

Compound A is thelightcrystalinesolid .IT gives thefollowing tests: i

1.	Compound A is thelightcrystalinesolid .IT gives thefollowing tests: i. ITdissolvesin dilute sulphuric acid, NO gas isproduced ii. A dropof MnO_(4) is added to theabovesolution .The pinkcolour disappears iii. Compound A is heatedstrongly .Gases B and C , with pungent smell , come out Abrown D is leftbehind iv . THe gas mixture (B and C) is passedinto a dchromate solution .The solutionturn green v. THe greensolutionfrom step (iv) gives a whiteprecipitateE with a soluttionof bariumnitrate . vi. Residue D fromstep (iii) isheated on charcoal in a reducingflame it gives a magnetic subsytance .Name thecompounds A,B,C, D and E
Answer» SOLUTION :A: `FeSo_(4):B : SO_(2) ,C: SO_(4),D: Fe_(2)O_(3),E : 7H_(2)O` It isagaina problem involving`FeSO_(4),7H)_(2)O`