Write the formula of an oxo-anion of Manganese (Mn) in which it shows the oxidation state equal to its group number.
Assign the reason for the following :
Copper (I) ion is not known in aqueous solution.
What are the transition elements ? Write two characteristics of the transition elements.
Describe the oxidising action of potassium dichromate and write the ionic equations for its reaction with (i) an iodide (ii) H₂S.
Explain the following observation :
Most of the transition metal ions exhibit characteristic colour in aqueous solution.
What is meant by ‘disproportionation’ ? Give an example of a disproportionation reaction in aqueous solution.
How would you account for the following ? Many of the transition elements are known to form interstitial compounds.
Explain the following :
(i) The enthalpies of atomization of transition metals are quite high.
(ii) The transition metals and many of their compounds act as good catalysts.
Define the following terms :
(i) Isotonic solutions
(ii) Van’t Hoff factor
Explain the following observation :
Most of the transition metal ions exhibit characteristic colour in aqueous solution.