Multiple choice

Consider the following statements: (1) At cold surface of glass, oxygen and hydrogen in air reacts to form water. (2) Water in the glass comes on the outer surface. (3) Water vapours in air, on contact with cold surface, lose energy and get converted into liquid state.

Which of the statements justify/justifies the condensation of water droplets at the outer surface of glass containing cold water?

  1. Only (1)

  2. Only (3)

  3. Only (1) and (2)

  4. Only (1) and (3)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The correct reason for the condensation of water droplets at the outer surface of glass containing cold water is the loss of KE of water molecules, when come in contact with cold surface.

Keep practicing — related questions