Passage - II : The solid(A) is a laboratory reagent. Give the following reactions.i) On strongly heating it gives two oxides of sulphur ii) On adding aqueous NaOH solution to its aqueous solution a dirty green precipitate is obtained, which starts turning brown on exposure to air. What is compound in dirty green ppt.

Passage - II : The solid(A) is a laboratory reagent. Give the followi

1.	Passage - II : The solid(A) is a laboratory reagent. Give the following reactions.i) On strongly heating it gives two oxides of sulphur ii) On adding aqueous NaOH solution to its aqueous solution a dirty green precipitate is obtained, which starts turning brown on exposure to air. What is compound in dirty green ppt.
Answer» `Ca(OH)_(2)` `Fe(OH)_(2)` `Fe(OH)_(3)` None of these Solution :`FeSO_(4).7H_(2)Ounderset(-7H_(2)O) OVERSET(300^(@)C)to 2FeSO_(4) overset("high T")to Fe_(2)O_(3)+SO_(2)+SO_(3)`. `Fe_(2)(SO_(4))_(3)3NaOH to underset("Dirty green ppt") (2FE(OH)_(3)+Na_(2)SO_(4))` Oxides are `SO_(2),SO_(3)`.