Chapter- 4 Test => 1( 11th Class ,Chemical Bonding and Molecular Structure)

1. Define a chemical bond.
2. Give the main feature of Lewis approach of chemical bonding.
3. Write electron dot structure (Lewis structure) of Na, Ca, B, Br, Xe, As, Ge, N^3-.
4. Give the main feature of Kossel’s explanation of chemical bonding.
5. How can you explain the formation of NaCl according to kossel concept?
6. Define electrovalent bond.
7. Give the octet rule in short.
8. Write the significance of octet rule.
9. Write the Lewis structure for CO molecule
10. Give the Lewis dot structure of HNO<sub>3.


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