Question

The correct statements among the following are:
I. $Sn{O}_2$ has an amphoteric character.
II. $O_3$ is a linear molecule.
III. Sulphur has oxidation states of +5 and +3 in disulphurous acid.

• A. I, II and III
• B. I & III only
• C. III only
• D. II & III only.

Answer 1

The correct option is A I, II and III

(I) Amphoteric oxides are the oxides that react with both acids and bases to form salt and water. Thus, $Sn{O}_2$ react with both $HCl$ (an acid) and $NaOH$ (base) to give salt and water.
(II) $O_3$ has a bent structure.

(III) The oxidation state of the sulfur atom bonded to 3 oxygen atoms is +5 while the oxidation number of other sulfur atom is +3.