Chemistry of Main Group Elements, Theories of Acids and Base-I

 
Semester  5th Paper 1st Important Questions

Question 1. Describe Bronsted Lowry concept of conjugate acid and base.
Question 2. What are differentiating and levelling solvents? Give examples.
Question 3. Explain the solvent system concept for at least two solvents.
Question 4. What is Pearson HSAB principle? Give its theoretical basis.
Question 5. What is symbiosis? Explain with examples.
Question 6. Why [CoF₆]^3- is more stable than [CoI₆]^3- ?
Question 7. Explain order of strength of acid character in following compounds:
(a) H₃PO₄, H₃PO₃, H₃PO₂
(b) H₂SO₄, H₂SO₃
(c) HClO₄, HClO₃, HClO₂, HOCl
Question 8. Explain thermodynamics of reduction of ore into metal with help of Ellingham Diagram.
Question 9. How Gold and Silver are extracted by Mac Arthur Forrest Cyanide Process?
Question 10. Write short note on:
(a) Mond Process
(b) Zone Refining
(c) Electrolytic Refining
(d) Van-Arkel-de-Boer Process
(e) Kroll Process
(f) Parting Process
Question 11. Cu can be extracted by hydrometallurgy but Zn can’t, why?
Question 12. Alkali metals give colour in flame while Be & Mg not, why?
Question 13. What is diagonal relationship? Explain with examples.
Question 14. What do you mean by allotropy? Explain various allotropes of sulphur.
Question 15. Why Bi⁵⁺ is stronger oxidising agent than Sb⁵⁺ ?
Question 16. While C=C is quite strong, Si=Si not, why?
Question 17. Why s-block elements don’t form coordination compounds like d block elements?
Question 18. Among Alkali & Alkaline Earth metal, which will form stable complexes and why?
Question 19. Draw & explain the structure of:
(a)Basic Beryllium Acetate
(b) Acetylacetone Potassium
Question 20. What are cryptates? How they differ from crown ether complexes ?
Question 21. Explain the magnetic character of Alkali metal-Ammonia solution.
Question 22. Explain the thermal stabilities of Alkaline earth metal carbonates.