The portion $AB$ of the indicator diagram representing the state of matter denotes
The liquid state of matter
Gaseous state of matter
Change from liquid to gaseous state
Change from gaseous state to liquid state
An ice cube at temperature $-20^o C$ is kept in a room at temperature $20^o C$. The variation of temperature of the body with time is given by
A substance is cooled at a constant power. Its temperature vs time graph is shown. The value of $S_{solid} : S_{liquid} : S_{gas}$
The saturation vapour pressure of water at $100°C$ is ........ $mm$ of mercury
Why is it difficult to cook on hills ?