| List-I (Classification of molecules based on octet rule) |
List-II (Example) |
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| A. | Molecules obeying octet rule | I. | NO, NO2 |
| B. | Molecules with incomplete octet | II. | BCl3, AlCl3 |
| C. | Molecules with incomplete octet with odd electron | III. | H2SO4, PCl5 |
| D. | Molecules with expanded octet | IV. | CCl4, CO2 |