Assertion : The process of conversion of liquid water to its vapours by heating the liquid is called boiling. Reason : The process of conversion of water vapours to liquid by cooling tha vapours is called condensation.

The change of liquid into gas even without heating is called _____

(b) Explain the following observations (b) Liquid ammonia bottle is cooled before opening the seal

A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out, the pressure in the liquid near the bottom of the liquid will

In a thermometer, when liquid gets heated, it ______ and when it is cooled down, it ___________.

Explain the following observations Liquid ammonia bottle is cooled before opening the seal

Connect with sports Air is not a pure substance. It helps us in many ways from breathing to playing. Balloon sports are a very popular sport. The basis of how the balloon works is that, hot air is lighter than cool air. which makes balloon rise up Find out more about Hot Air balloons.

Which one among a solid , liquid gas of same mass and at the same temperature has the greatest internall energy . Which one has least and why ?

Give an example each (i) gas in liquid (ii) solid in liquid (iii) solid in solid (iv) gas in gas.