(a) How would you account for the
(i) The transition elements exhibit high
enthalpies of atomisation.
(ii) The 4dand 5dseries of the
transition metals have more frequent
metal−metal bonding in their compounds than do
(iii) There is a greater range of oxidation states
among the actinoids than among the lanthanoids.
(b) Write the complete
chemical equation for each of the following:
(i) An alkaline solution of
KMnO4reacts with an iodide.
(ii) An excess of
SnCl2solution is added to a solution
of mercury (II)
An aqueous solution freezes at 272.4 K, while pure water freezes
at 273.0 K. Determine
(i) the molality of the solution
(ii) the boiling point of the solution
(iii) the lowering of vapour pressure of water at 298 K
[Given Kf= 1.86 K kg
Kb= 0.512 K kg
pressure of water at 298 K = 23.756 mm Hg]
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