The graph in Fig.-1 shows the temperature changes during cooling of a gas at atmospheric pressure. Which of the following statements concerning this is/are correct?
1) Conversion of matter from liquid state to solid state is an endothermic process
2) The curve CD represents the solid state of a gas.
3) The curve BC represents latent heat of vaporisation.
A. 1 & 2 only.
B. 1Only.
C. 3 only. ?
D. 2 only
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