Question

A salt on treatment with dil. HCl gives a pungent smelling gas and a yellow precipitate. The slt gives green flame when tested. The salt solution gives a yellow precipitate with potassium chromate. The salt is
A. `NiSO_(4)`
B. `BaS_(2)O_(3)`
C. `PbS_(2)O_(3)`
D. `CuSO_(4)`

Answer 1

Correct Answer - B
`Ba^(+2)+2CH_(3)COO^(-) to (CH_(3)COO)_(2)Ba`
`BaS_(2)O_(3)` gives `SO_(2)` gas withdil. HCl and also yellow ppt. of barium chromate.
`(CH_(3)COO)Ba+K_(2)CrO_(4) to 2CH_(3)COOK+ underset("yellow ppt.")(BaCrO_(4))darr`