A very common adsorbent used in column chromatography is

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Chalk

Sodium carbonate

Alumina

Powdered charcoal

answer is B.

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Detailed Solution

Silica is the most often used polar and acidic support in adsorption chromatography. This support has surface silanol groups that tend to adsorb polar molecules and are especially effective for basic substances. The most common kind of polar and basic adsorbent used in adsorption chromatography is alumina.

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