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

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)

Gels are often classified as two-phase while magmas are considered single-phase. True False

Consider gel-filtration chromatograpy and select the correct statement(s).Question 3Answer1.The larger the volume a particle wanders in, the earlier it elutes.2.The total column volume equals to the sum of the internal bead volume and of the volume between the beads.3.The larger the volume a particle wanders in, the later it elutes.4.The solid phase is composed of porous beads.5.It separates the analyte components according to their size

With regard to gelatin , which is true ?  Question 8AnswerIt is lyophilic with water  It is lyophilic with alcohol  It is associated sol with alcohol It is lyophobic with water  A gel is formed using cold water