Which of the following adsorbent is used to decolourise yellow glycerine ?
Correct answer: D. Activated carbon
- A. Silica gel
- B. Alumina
- C. Fuller's earth
- D. Activated carbon
Explanation
Activated carbon has a highly developed porous surface and strongly adsorbs coloured organic impurities, so it is commonly used to decolourise glycerine. Silica gel and alumina are mainly selected for drying or specific adsorption separations.
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