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ENTRANCE TEST – 2015 Multiple Questions and Answers.
| 6. | Which one of the following pairs has the same electronic configuration as possessed by Neon (Ne-10)? | ||
| A. | Na+, Cl― | ||
| B. | K+, Cl― | ||
| C. | Na+, Mg2+ | ||
| D. | Na+, F― | ||
| 8. | There are four orbitals s, p, d and f. Which order is correct with respect to the increasing energy of the orbitals? | ||
| A. | 4s < 4p < 4d < 4f | ||
| B. | 4p < 4s < 4f < 4d | ||
| C. | 4s < 4f < 4p < 4d | ||
| D. | 4f < 4s < 4d < 4p | ||
| 10. | The half-life of N2O5 at 0 oC is 24 minutes. How long will it take for sample of N2O5 to decay to 25% of its original concentration? | ||
| A. | 24 minutes | ||
| B. | 72 minutes | ||
| C. | 120 minutes | ||
| D. | 48 minutes | ||
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