A solid material is supplied with heat at a constant rate. The temperature of the material is changing with heat input as shown
(i) AB: change of state from solid to liquid.
CD: change of state from liquid to vapour
(ii) When `CD=2AB`, i.e., latent heat of vapourization is twice the latent heat of fusion of the substance.
(iii) The reciprocal of slope of DE represents the heat capacity of vapour state of substance .
(iv) If slope of `OAgt`slope of BC, i.e., specific heat of liquid state is greater than specific heat that of solid state.

Options

A. Statement -`1` is True , Statement -`2` is True , Statement -`2` is correct explanation for Statement - `1`
B. Statement -`1` is True , Statement -`2` is True , Statement -`2` is not correct explanation for Statement - `1`
C. Statement -`1` is True , Statement -`2` is False.
D. Statement -`1` is False , Statement -`2` is True.

Answer

A