Multiple choice

Sometimes the bottom of steel utensils turn black during cooking. Which of the following conclusions can be drawn for the same?

  1. Steel utensils have high percentage of carbon.

  2. Steel utensils have high percentage of iron.

  3. Insufficient combustion of fuel takes place.

  4. Non-conventional source of energy is used.

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Due to insufficient combustions of fuel, steel utensils turn black from the bottom.