`{:(FeCI_(3)"solution" +(NH_(4))_(2)S overset("Neutral medium")rarr,"Black ppt".(A)),(," &quo

`{:(FeCI_(3)"solution" +(NH_(4))_(2)S overset("Neutral medium")rarr,"Black ppt".(A)),(," "darrdil.H_(2)SO_(4)),(,"White ppt". (B) +Gas (C)):}` while `AICI_(3)` solution `+(NH_(4))_(2)S rarr` White ppt.(D)
White ppt. (B) and gas (C) are:
A. S and `SO_(2)`
B. `H_(2)S` and S
C. `Fe(OH)_(2)` and `H_(2)S`
D. S and `H_(2)S`

`{:(FeCI_(3)"solution" +(NH_(4))_(2)S overset("Neutral medium")rarr,"Black ppt".(A)),(," "darrdil.H_(2)SO_(4)),(,"White ppt". (B) +Gas (C)):}` while `

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