The figure given below shows the cooling curve of pure wax material after heating. It cools from $A$ to $B$ and solidifies along $BD$. If $L$ and $C$ are respective values of latent heat and the specific heat of the liquid wax, the ratio $L/C$ is
$40$
$80$
$100$
$20$
The temperature at which the vapour pressure of a liquid becomes equals to the external (atmospheric) pressure is its
Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures
A solid material is supplied with heat at a constant rate. The temperature of material is changing with heat input as shown in the figure. What does slope $DE$ represent.
A closed bottle containing water at $30^{\circ} C$ is open on the surface of the moon. Then,
A liquid boils when its vapour pressure equals