Dry ice is

Write a latent heat unit and dimensional formula. On what does the value of latent heat depend ?

When the pressure on water is increased the boiling temperature of water as compared to $100°C$ will be

A solid substance is at $30°C$. To this substance heat energy is supplied at a constant rate. Then temperature versus time graph is as shown in the figure. The substance is in liquid state for the portion (of the graph)

The portion $A B$ of the curve representing the state of matter denotes

When $M_1$ gram of ice at $-10\,^oC$ (specific heat $= 0.5\, cal\, g^{-1}\,^oC^{-1}$) is added to $M_2$ gram of water at $50\,^oC$, finally no ice is left and the water is at $0\,^oC$. The value of latent heat of ice, in $cal\, g^{-1}$ is