| 66. | Sulphur has charge of |
| a. | −3 |
| b. | −2 |
| c. | −1 |
| d. | 0 |
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Answer: (b).−2
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| 67. | One molecule of water contains oxygen atoms, which are |
| a. | 3 |
| b. | 2 |
| c. | 4 |
| d. | 1 |
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Answer: (d).1
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| 68. | Branch of chemistry showing quantitative relationship between reactants and products is |
| a. | spectrometry |
| b. | electrometry |
| c. | stoichiometry |
| d. | photometry |
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Answer: (c).stoichiometry
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| 69. | Aluminium has charge of positive |
| a. | 1 |
| b. | 2 |
| c. | 3 |
| d. | 4 |
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Answer: (c).3
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| 70. | Masses of atoms or molecules expressed in grams is known as |
| a. | Molar mass |
| b. | empirical mass |
| c. | weight |
| d. | empirical mass |
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Answer: (a).Molar mass
|