Some pale green crystals are strongly heated .The gases then off are passed into a container surrounded by ice and then through a solution of acidified `KMnO_(4)` The `KMnO_(4)` is decolourised, a waxy white solid is formed in the ice container, this is dissolvesd in water .The solution will

Options

A. Give a precipitate with silver nitrate solution
B. Give a precipitate with barium chloride solution
C. Turn red litmus blue
D. Give blue colour with starch solution

Answer

b

Explanation

Assume green crystal of `FeSO_(4)`
`FeSO_(4) overset(Delta) to Fe_(2)O_(3) + SO_(2) + SO_(3)`
`SO_(3) + MnO_(4)^(Theta) rarr Mn^(2-) + SO_(4)^(2-)`
`SO_(3)` forms waxy white solid `(H_(2)SO_(4))` in ice container white is dissolved in water and gives `SO_(4)^(2-)` ion .When `BaCI_(2)` reacts `SO_(4)^(2+)` ion it forms ppt of `BeSO_(4)`