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| Q. |
All noble gases are - |
| A. | Colourless |
| B. | Odourless |
| C. | Colourless and Odourless |
| D. | Light blue |
| Answer» C. Colourless and Odourless | |
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Explanation: Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment. |
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