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_____________ is the amount of moisture a material will absorb relative to ambient temperature and humidity conditions.

a) Lyophilization
b) Hygroscopic action
c) Hydrophobic action
d) Hydrophilic action

Answer: b
Explanation: Hygroscopic action is the amount of moisture a material will absorb with respect to the temperature and humidity conditions. Due to hydroscopic action, the sample will continuously increase/ decrease in weight.

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