Critical humidity of a solid salt means the humidity_____________________?
Correct answer: C. Both A. and B.
- A. Above which it will always become damp
- B. Below which it will always stay dry
- C. Both A. and B.
- D. Above Which it will always become dry and below which it will always stay damp
Explanation
Critical humidity is the boundary humidity: above it, the salt tends to absorb moisture and become damp, while below it, the salt remains dry. Thus both statements A and B describe the two sides of the critical value.
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