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ENTRANCE TEST – 2015 Multiple Questions and Answers.
| 16. | Electronic configuration of Gold [Au79] is | ||
| A. | [Xe] 4f14, 5d10, 6s1 | ||
| B. | [Xe] 4f10, 5d10, 6s2 | ||
| C. | [Xe] 4f14, 5d9, 6s2 | ||
| D. | [Xe ]4f14, 5d10, 6s2 | ||
| 17. | Electronic configuration of Gold [Au79] is | ||
| A. | [Xe] 4f14, 5d10, 6s1 | ||
| B. | [Xe] 4f10, 5d10, 6s2 | ||
| C. | [Xe] 4f14, 5d9, 6s2 | ||
| D. | [Xe ]4f14, 5d10, 6s2 | ||
| 18. | About 80% of ammonia is used for the production of | ||
| A. | Explosives | ||
| B. | Fertilizers | ||
| C. | Nylon | ||
| D. | Polymers | ||
| 19. | Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition Is | ||
| A. | NH2CO | ||
| B. | N2H5CO2 | ||
| C. | N2H4CO2 | ||
| D. | N2H4CO | ||
| 20. | What is the percentage of nitrogen in NH3NO3? | ||
| A. | 65% | ||
| B. | 35% | ||
| C. | 20% | ||
| D. | 58% | ||
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