Multiple choice

Raju has a beaker filled with water. He started heating the water with a burner. Before the water began to boil, he saw tiny bubbles in the water beaker. What do these bubbles show?

  1. Water is evaporating

  2. Air is dissolved in water

  3. Bubbles of hydrogen are coming out

  4. Both (1) and (3)

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

Air dissolved in the water comes out in form of bubbles when it is heated.