Q: A solid material is supplied with heat at constant rate and the temperature of the material changes as shown. From the graph, the false conclusion drawn is
(a) AB and CD of the graph represent phase changes
(b) AB represents the change of state from solid to liquid
(c) Latent heat of fusion is twice the latent heat of vaporization
(d) CD represents change of state from liquid to vapour
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Ans: (c)