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| Q. |
Which zone of a candle flame is the hottest? |
| A. | Dark innermost zone |
| B. | Outermost zone |
| C. | Middle luminous zone |
| D. | Central zone |
| Answer» C. Middle luminous zone | |
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Explanation: The outermost zone of the flame is blue in colour and it is the hottest part. The innermost zone is the least hot and black in colour. |
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