D-block elements form co-ordination compounds. Give reasons.

What are co-ordination compounds ?

d-block elements form complex compounds, Give reason.

d-block elements form coloured ions because

State EAN rule for co-ordination compounds.

Define linkage isomerism of co-ordination compound. Give an example ?

Define linkage isomerism of.co-ordination compounds. Give an example.

An element X (2, 8, 2) combines separately with SO_(4)^(2-),PO_(4)^(3-) radicals. (i) Write the formulae of the two compounds so formed. (ii) To which group of the modern periodic table does the element X belong? (iii) Will it form covalent or ionic compound ? Give reasons.

In which one of the pairs of ion given, there is an ion that forms a co-ordination compound with both aqueous sodium hydroxide and ammonia and an other ion that forms a co-ordination compound only with aqueous sodium hydroxide?

State EAN rule for Co-ordination compounds.How many ions are formed the complex.[Co(NH_3)6]CL_2 in solution.

Write any two postulates of Werner's theory of co-ordination compounds.