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Hema and Heena are best friends. On one evening, Hema went to the house of Heena and found her working in the kitchen. The gas burner was emitting yellow flame instead of blue flame.
Hema immediately asked Heena to put off the gas. She helped her in cleaning the fire holes of the gas burner with a needle. The gas was now ignited and there was a blue flame. The burner was emitting yellow flame due to

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Complete burning of the fuel

High calorific value of the fuel

Incomplete burning of fuel

Incomplete cooking of food

answer is B.

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Incomplete burning of fuel results in yellow flame.

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