Equilibrium moisture of a solid is equal to the total moisture minus free moisture. Which of the following substances will have maxi-mum equilibrium moisture ?
Correct answer: C. Bamboo
- A. Anthracite coal
- B. Rag paper
- C. Bamboo
- D. Inorganic solids
Explanation
Bamboo is a hygroscopic, porous material, so it retains more bound moisture at equilibrium than anthracite coal or inorganic solids. Rag paper also absorbs moisture, but bamboo generally has the higher equilibrium moisture content among these choices.
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