Macroporous hydrogels can be made through the process known as cryogelation. Which one of the following best describes this process?Group of answer choicesParticles are added to a polymer solution to act as templates for the formation of pores.A polymer solution is cooled to partially freeze the solvent and then chemically crosslinked.A polymer solution is chemically crosslinked and then cooled to form pores.A porous hydrogel is made by physical gelation.

A substance that is solute in a colloidal stage.AerogelDispersed phaseDispersed mediumBoth B and C

Small or large molecules dispersed in an aqueous liquid to which a gelling agent has been added are called gels or jellies. True False

Match the following terms related to gels with the correct definition or description. - imbibition - swelling - syneresis - thixotropy - xerogel A. the dispersion medium is expressed in droplets and the gel shrinks B. taking up a liquid with an increase in volume C. a gel changes from semisolid to liquid without a change in volume or temperature D. taking up liquid without increasing in volume E. a gel from which the liquid has been removed, leaving only the framework (the dispersed phase and any solids in the dispersion medium)

Which of the following statements are TRUE regarding Gels? Select all that apply. A. Gels usually need to be shaken to liquefy them for pouring because they may form a thixotrope. B. A gel is made of plastic. C. Single phase gels have macromolecules uniformly distributed throughout a liquid D. Two phase gels have floccules of small particles and are also called magmas

The pore size in a polyacrylamide gel can be controlled by manipulating the ratio of (a) Acrylamide and TEMED (b) Acrylamide and Bis-acrylamide (c) Bis-acrylamide and SDS (d) Bis-acrylamide and APS