(a) Draw the structures of the following molecules:

(i) (HPO₃)₃

(ii) BrF₃

(b) Complete the following chemical equations:

(i) HgCl₂ + PH₃-->

(ii) SO₃ + H₂SO₄ -->

(iii) XeF₄ + H₂O  -->

 OR

(a) What happens when?

(i) Chlorine gas is passed through a hot concentrated solution of NaOH?

(ii) Sulphur dioxide gas is passed through an aqueous solution of a Fe (III) salt?

(b) Answer the following:

(i) What is the basicity of H₃PO₃ and why?

(ii) Why does fluorine not play the role of a central atom in inter-halogen compounds?

(iii) Why do noble gases have very low boiling points?