Examples of index fossils. Index fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages).
Methyl cellulose. Methyl cellulose (or methylcellulose) is a chemical compound derived from cellulose. It is a hydrophilic white powder in pure form and dissolves in cold (but not in hot) water, forming a clear viscous solution or gel.
Yes, you can find solubility rules like these: 1. All alkali metal (lithium,sodium,potassium,rubidium, and cesium) and ammonium compounds are soluble. 2. All acetate, perc â¦ hlorate, chlorate, and nitrate compounds are soluble. 3. Silver, lead, and mercury(I) compounds are insoluble.4. Chlorides, bromides, and iodides are soluble.o, Polyvinyl Acetate (PVAC) is not soluble in water. Polyvinyl Acetate (pVAC) is an organic chemical and made from polymerization from monomers. It is soluble in Unsaturated â¦ Polyesters (UP) Resins.