Question

Keerti was helping her mother in the kitchen.
She noticed that the gas was burning with a
yellow flame which resulted in blackening of
utensils while cooking. She thought something
might have gone wrong. What might be
wrong? Find out what should be done to avoid
blackening of utensils while cooking.​

Answer 1

Answer:

While cooking, if the bottom of the vessel is getting blackened on the outside, it means that the fuel is not burning completely. When the fuel burns completely giving a blue flame, the bottom of the vessel remains clean.

When the fuel does not burn completely then a sooty flame appears which makes the bottom of the utensil black. It is due to the air holes, which are getting blocked and the fuel does not burn completely.

Explanation:

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Answer 2

Explanation:

The bottom of cooking utensils are painted black because black surface absorb heat and so the content of the utensils get cooked rapidly