(a) Give reasons for the following :
(i) `SF_(6)` is a well known compound but `SCl_(6)` is not known
(ii) In aqueous solution, HF is a weaker acid than HCl
(iii) Addition of `Cl_(2)` to KF solution gives it a brown colour but excess of `Cl_(2)` turns it colourless
(b) Draw the structures of
(i) Peroxodisulphuric acid
(ii) bromine trifluoride.

Give appropriate reasons for the following : Addition of Cl_2 to Kl solution gives a brown colour but excess of Cl_2 turns it colourless

Assign appropriate reasons for each of the following statements. (i)More metal fluorides are ionic in nature than metal chlorides. (ii) Hydrogen fluoride is a weaker acid than hydrogen chloride in aqueous solution. (iii)In aqueous solution HI is a stronger acid than HCI ? (iv) Addition of Cl_(2) to KI solution gives it a brown colour but excess of Cl_(2) turns it colourless. (v) Perchloric acid is a stronger acid than sulphuric acid.

Give appropriate reasons for each of the following : (a)Addition of Cl_2 to Kl solution gives a brown colour but excess of Cl_2 turns it colourless (b)Perchloric acid is a stronger acid than sulphuric acid. ( c)HI can not be prepared by heating Nal with concentrated H_2SO_4

Assign reasons for the following : (i) Copper (I) ion is not known in aqueous solution. (ii) Actinoids exhibit greater range of oxidation states than lanthanoids.

Assign reasons for the following : (i) Copper (I) ion is not known in aqueous solution. (ii) Actinoids exhibit greater range of oxidation states than lanthanoids.