A well insulated substance in solid state is heated at a constant rate until it vaporizes completely. The temperature-time graph of the substance is shown below . Which of the following statements is//are true?

Options

A. The specific heat capacity of the substance in solid state is greater than that of the substance in liquid state.
B. The specific latent heat of fusion of the substance is greater than the specific latent heat of vaporization of the substance.
C. If the rate of heating increases, the slope of `AB` will be increased but the length of `BC` remains unchanged.
D. If the mass of the substance is doubled, the length of `DE` is also doubled but the slope of `CD` is halved.

Answer

B, D

Explanation

`(B) L_(f) prop BC` & ` L_(V) prop DE`
`(D) DE prop m`, slope of `CD prop (1)/(m)`