Multiple choice

A substance can exist as a solid, a liquid or a gas, depending on the pressure and temperature. Which of the following is that substance?

  1. Milk

  2. Iron

  3. Coal

  4. Water

  5. Oxygen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as water can exist in all the three physical states, i.e. solid, liquid and gas, depending on the pressure and temperature.

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