Exercise :: General Science - Elements and Metals
- General Science - Elements and Metals
- General Science - Measurements
- General Science - Nuclear Science
- General Science - Synthetic Materials
32. | Permanent hardness of water may be removed by the addition of |
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34. | The most important ore of aluminium is |
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Answer: Option D Explanation: Bauxite is an aluminium ore and is the main source of aluminium.
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