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Answer:
c) 194 to 197
Step-by-step explanation:
The melting point of pure phthalic acid is 194 to 197 degrees Celsius.
Phthalic acid is a white, odorless solid that is soluble in water and alcohol. It is used in the production of plastics, resins, and other chemicals.
Conclusion:
The answer is: c) 194 to 197