Certain gels liquefy to a sol on shaking and set again to a gel on standing. This behaviour is known as:

Athixotropy
Belectro-osmosis
Cimbibition
Dsyneresis

Answer: A

The isothermal, reversible gel-to-sol change on shaking, with re-setting at rest, is thixotropy. Syneresis is the weeping of liquid from a gel and imbibition is its swelling.

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