Question

A white precipitate was formed when BaCl₂ was added to extract of an inorganic salt. Farther, 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 ______.

Options

• I^-

• \[\ce{SO^{2-}_3}\]

• S^2-

• \[\ce{NO^{-}_2}\]

Answer 1

A white precipitate was formed when BaCl₂ was added to extract of an inorganic salt. Farther, 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 \[\underline{\ce{SO^{2-}_3}}\].

Explanation:

\[\ce{BaCl2 + SO_3^{2 -} -> \underset{white}{BaSO3}\downarrow ->[dil. HCl] \underset{burning sulphur like smell}{\underset{(X)}{SO2 \uparrow}}}\]

So, the anion present in the inorganic salt is \[\ce{SO^{2-}_3}\].