When cold water is kept in a glass, small droplets are formed on the surface of the glass after a while. How does this happen? What is this phenomenon called? Can the reverse of this phenomenon happen? If so, what is that process called? Explain with an example. [5 MARKS]

Open in App

Solution

Explanation: 1 Mark each.

1. This phenomenon of water droplets being formed on a cool water bottle is called condensation.

2. Condensation happens because of the temperature difference. The water vapour present in the air cools down due to the low temperature of water inside the glass and forms small droplets of water on the surface of the glass.

3. The reverse of this phenomenon is liquid being turned into gas, and this process can happen.

4. This process is called evaporation. Evaporation is the conversion of a liquid into a gas by application of heat.

5. Example: Heating water turns it into steam.

Suggest Corrections

Similar questions

What will happen when we mix sugar in a glass of water? What is this property called? [2 MARKS]

Blackboard dries up after wiping it with water. This is because of phenomenon X. The droplets on the outer surface of the cold glass are due to phenomenon Y. Which one of the following is correct?

A glass filled with ice cubes was placed on a table. After a while, water droplets appeared on the glass surface.

Which of these sentences is/ are TRUE?
i) This phenomenon is known as condensation.
ii) This proves that water vapour is present in the air.
iii) This is also observed when a hot object vapour in the open.

Q. A glass of water with some pieces of ice in it, after some time, small drops of water forms on the outer surface of the glass. This process is called as

Water spilled on the floor vanishes after some time even when left unattended. This is because of phenomenon X.The formation of droplets on the outer surface of a glass tumbler containing cold water is due to phenomenon Y. Which one of the following is correct?

Join BYJU'S Learning Program