Large quantity of silica gel is normally dried in a _________________ dryer?
Correct answer: C. Through circulation
- A. Freeze
- B. Rotary vacuum
- C. Through circulation
- D. Tray
Explanation
Through-circulation dryers are suitable for drying large quantities of porous or granular solids such as silica gel because heated air passes through the bed, improving contact and drying rate. Freeze and rotary-vacuum dryers are generally chosen for more specialised materials or conditions.
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