Chemistry of Main Group Elements-II

 

 Semester  5th Paper 2nd Important Questions

Set A

Question 1. What is multicentre bonding? Explain the structure of Diborane.
Question 2. Give order of basic character of Hydrides of Nitrogen family. Explain with reason.
Question 3. Give order of reducing character of Hydrides of Oxygen family. Explain with reason.
Question 4. While H₂O is liquid all other hydrides of group are gases at room temperature, why?
Question 5. What are oxo acids? Give industrial preparation of Sulphuric acid.
Question 6. Among Halogens and Interhalogen compounds, which are more reactive and why?
Question 7. What structure PCl₅ adopts in gaseous and solid medium? Explain these structures on basis of VBT & VSEPR.
Question 8. Predict the geometry & shape of ClF3, BrF5, IF7 & [ClF₂]^- on basis of VBT & VSEPR.
Question 9. How pseudo-halogens resembles with halogens?
Question 10. Group 18 elements are Noble rather than inert, how?
Question 11. What do you mean by clathrate? How they are prepared?
Question 12. Explain the structure and chemical properties of XeF₄, XeF₆.
Question 13. Differentiate between organic & inorganic polymers.
Question 14. Classify silicates on basis of their structure. Give example of each.
Question 15. Give ring opening mechanism of cyclic siloxanes.
Question 16. What is borazine? Why it is called inorganic benzene?
Question 17. Explain bonding in triphosphazene.
Question 18. Write short note on substitution on phosphazene to alter side chains.

Semester  5th Paper 2nd Important Questions

Set B

Q.1 What is multi-centre bonding? How it is different from conventional bonds?

Q.2 Explain bonding in diborane. Why BH3 exists as dimer?

Q.3 How acidic character of Hydrides of Chalcogens and Halogens varies down the group?

Q.4 How basic character of Hydrides of Pnicogens varies down the group?

Q.5 How oxides of Phosphorous act as dehydrating agent?

Q.6 Give order of acidic character & reason for (A) HClO₄, HClO₃, HClO₂, HClO
(B) H₃PO₄, H₃PO₃, H₃PO₂
(C) H₂SO₄, H₂SO₃

Q.6 Write note on (a) pseudohalide (b)interhalogen compounds.

Q. 7 Out of halogen and pseudohalogen, which are more reactive and why ?

Q.8 Give preparation of PCl₃, PCl₅, SOCl₂, SO₂Cl₂ .

Q.9 How PCl₃, PCl₅, SOCl₂ and SO₂Cl₂ act as halogenating agent?

Q.10 Noble Gases are not called Inert Gases, why ?

Q.11 Write short note on Clatherates.

Q.12 Discuss structure and bonding in XeF₆, XeF₄, XeF₂, XeOF₄, XeO₂F₂, XeO₃ on basis of VBT & VSEPR.

Q.13 How would you prepare XeF₆, XeF₄, XeF₂? Give their hydrolysis reactions.

Q.14 What makes Inorganic polymers distinctive from Organic polymers ?

Q.15 Give structure and Classification of Siicates (Orthosilicates, pyrosilicates, chain silicates, double chain silicates, sheet silicates, tectosilicates)

Q.16 Give synthesis of Silicones. How Muller Roschow process is better than Grignard reagent method in preparation of silicones?

Q.17 Give acid catalysed and base catalysed mechanism of ring opening in cyclosiloxanes.

Q.18 Borazine is Inorganic Benzene but not behaves always like benzene, why?

Q.19. How side substitution in polyphosphazenes is tedious task & how selectively it can be done?

Q.20 Explain bonding in Cyclo-triphosphazene.