Chapter 4 Chemistry-I
1. Give postulates of Electron pair repulsion theory with example of BF3.
2. What is Coordinate covalent bond? Explain the formation of POCl3 molecule, NH+ and H3O+.
3. Explain ionic character of a covalent bond.
4. Define: bond energy,bond distance.
5. Explain sp3 hybridization? Give one example.
6. What is hybridization? Explain SP2 Hybridization.
7. State and explain covalent bond with suitable examples.
8. Define dipole moment. Which of the following contain dipole moment: PPCl3, CS2, H2S, CCL4
9. Explain the shapes of CO2 and H2O molecules with the help of dipole moment.
10. Explain bond formation in sodium chloride or Energy changes in bond formation.
11. Reasons:
i.
Bond angle in H2O is smaller than in NH3.
ii.
CO2 is polar but has zero dipole moment.
iii.
Polar bond is stronger than non-polar bond.
12. Write short notes on:
i.
Sigma and Pi bond
13. Distinguish between:
i.
Atomic orbital and molecular orbital
ii.
Polar bond and ionic bond
iii.
Bonding molecular orbital and anti-bonding molecular orbital
iv.
Polar and non-polar covalent bond
14. Importance of hydrogen bond in biological processes. How does it affect physical properties of
compounds.
15. Draw dot and cross structure of CHCL3.
16. Give ground and excited state configuration of carbon.
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