| 21. | Formula showing simplest whole number ratio is |
| a. | scientific |
| b. | mathematical |
| c. | molecular |
| d. | empirical |
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Answer: (d).empirical
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| 22. | Number of isotopes occupied by Palladium is |
| a. | seven |
| b. | six |
| c. | nine |
| d. | eleven |
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Answer: (b).six
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| 23. | Amount of KOH used in combustion analysis is |
| a. | 50% |
| b. | 60% |
| c. | 70% |
| d. | 80% |
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Answer: (a).50%
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| 24. | Number of radioactive isotopes is |
| a. | 30 |
| b. | 40 |
| c. | 50 |
| d. | 60 |
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Answer: (b).40
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| 25. | Unstable isotopes are produced by artificial |
| a. | Disintegration |
| b. | splitting |
| c. | energy less |
| d. | absorbance |
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Answer: (a).Disintegration
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