Multiple choice

What happens when water is heated in a paper cup?

  1. Paper cup burns up without any change in the temperature of water.

  2. Paper cup burns up with water undergoing the boiling process.

  3. There is no effect on both paper cup and water.

  4. Water continues to boil without paper cup getting burnt up.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When water is heated in a paper cup over a flame, the water absorbs the heat through conduction and convection. The water's boiling point (100°C) is well below the paper's ignition temperature (233°C or higher). As long as water remains in the cup, the paper cannot reach its ignition temperature, preventing it from burning.

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