Question

A white precipitate was formed when BaCl2 was added to water extract of an inorganic salt. Further, a gas 'X' with characteristic odour was released when the formed white precipitate was dissolved in dilute HCl. The anion present in the inorganic salt is

• A. I-
• B. $SO^{2-}_3$
• C. S2-
• D. $NO^{-}_2$

Answer 1

Answer: (B)

$SO^{2-}_3$

Answer 2

The correct answer is (B) : $SO^{2-}_3$
Anion is
$SO^{2-}_3$
$BaSO_3 \stackrel{dil.HCL}{→} SO_2 ↑$
X (gas)
Gas is released with smell of burning sulphur.