To remove all the moisture from a wet solid it requires exposure to _____________ air?
Correct answer: B. Perfectly dry
- A. Highly humid
- B. Perfectly dry
- C. High temperature
- D. None of these
Explanation
Complete removal of moisture requires air with zero moisture content, because any water vapour in the air establishes a nonzero equilibrium moisture content in the solid. Highly humid air would reduce the drying driving force rather than remove all moisture.
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