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    Question

    Identify the hottest part of a gas

    flame.
    A Blue zone Correct Answer Incorrect Answer
    B Non-luminous zone Correct Answer Incorrect Answer
    C Luminous zone Correct Answer Incorrect Answer
    D Dark zone Correct Answer Incorrect Answer

    Solution

    The non-luminous zone of a gas flame, characterized by its blue color, is the hottest part. This zone indicates complete combustion, as it has an ample supply of oxygen which enables it to reach the highest temperatures compared to other parts of the flame.

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