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Because it starves it of oxygen, without oxygen the combustion is not as efficient. When the sides of the bunsen burner are open it draws air into the tube like a venturi and makes the combustion of the gas more efficient.

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What is the colour of a half-opened Bunsen burner?

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The temperature of an orange flame on a Bunsen burner is typically around 1,100 degrees Celsius (2,010 degrees Fahrenheit). The color of the flame is an indication of the temperature, with blue flames being hotter than yellow or orange flames.


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What colour is the Bunsen burner safety flame?

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Which flame on a Bunsen burner is silent?

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What is orange flame in Bunsen burner also called?

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How can the flame of a Bunsen burner be controlled?

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