When the pressure on water is increased the boiling temperature of water as compared to $100°C$ will be
Lower
The same
Higher
On the critical temperature
A quantity of heat required to change the unit mass of a solid substance, from solid state to liquid state, while the temperature remains constant, is known as
The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is its
The graph shown in the figure represent change in the temperature of $5 \,\,kg$ of a substance as it abosrbs heat at a constant rate of $42 \,\,kJ min^{-1}$. The latent heat of vapourazation of the substance is ......... $kJ \,kg^{-1}$
Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures
Fire is extinguished more effectively by