The given graph represents the cooling curve of substance X. Which of the following statements are incorrect? I. Process I represents cooling of liquid state of X while process III involves cooling of the solid state. II. The freezing point of substance X is `25^(@)C`. III. At `35^(@)C`, the substance exists in solid state. IV. Substance X exists both in gaseous and liquid form along the curve QR.
A
I and III only
B
II and IV only
C
III and IV only
D
None of these
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The correct Answer is:
A
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