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2 C 20093
How do you account for closeness of atomic radii of zirconium and hafnium ?

The compounds of s and p block element are generally colourless, whereas that of transition elements

are coloured. Explain.
Briefly describe ionization isomerism in co-ordination compounds.
Give the structure and significance of carboplatin.
Differentiate inert and labile complexes.
Briefly describe the structure of [Co,(CO),].
Explain Chelate effect.
Explain the toxicity of mercury.
Briefly describe Ellingham diagram for metal oxides.
Why is a solution of copper(1))sulphate blue ?
(10 x 2 = 20 marks)
Section C (Paragraph)

Answer any five questions.

Each question carries 6 marks.
Give a comparison of lanthanides and actinides.
Write a note on spectrochemical series.
Briefly describe Mond's process.
Describe the structure of ferrocene.
Explain the biochemistry of calcium.
Discuss the factors influencing the extent of crystal field splitting.
Describe the open-hearth process.

Briefly describe the toxicity of lead and arsenic.

(5 x 6 = 30 marks)

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