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.
Ethanol is soluble in water because the-OH group of ethanol (CH3CH2OH) can form hydrogen bonds with water.Hydrogen bonding occurs when a very electronegative molecule like O â¦ , N, F are bonded to molecules like hydrogen. For this example, I'll talk about groups that have-NH, -SH, -OH.herefore, they are too different from each other and are not miscible... Old (not so good) Answer Hexane is not soluble in water because Hexane is a Nonpolar solvent while water is Polar solvent. Like dissolves like.