| 26. | Number of isotopes occupied by carbon is |
| a. | three |
| b. | seven |
| c. | five |
| d. | six |
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Answer: (a).three
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| 27. | Mass of one molecule of sulphuric acid is |
| a. | 98 |
| b. | 95 |
| c. | 97 |
| d. | 92 |
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Answer: (a).98
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| 28. | Law of definite proportion is obeyed in |
| a. | Stoichiometry |
| b. | electrometry |
| c. | spectrometer |
| d. | photometry |
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Answer: (a).Stoichiometry
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| 29. | Mass spectrometer use to determine isotopes in solid state is |
| a. | Bohr's |
| b. | Aston's |
| c. | dempester's |
| d. | Alison's |
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Answer: (c).dempester's
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| 30. | Amount of oxygen in combustion analysis is determined by method of |
| a. | product |
| b. | difference |
| c. | addition |
| d. | division |
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Answer: (b).difference
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