16- One of the followings is NOT a characteristic of polymers. a. Created via the polymerization of monomers b. They're called macromolecules C. Those of few repetitive unites are called oligomers d. They have small molecular weight 17- Fill in the blanks: is a condensation reaction because 2 monomers are condensed into a longer unit to form dimers then trimers while is when two monomers are added to each other with the elimination of a double bond. 18- Soap has the ability to clean greasy surfaces or stains compared to plain water, because: a. The structure of soap contains a hydrophilic part that bonds to stains and remove them from the surface to water. b. The structure of soap contains a hydrophobic part that bonds to stains and remove them from the surface to water. c. Soap is a powerful anti germ. d. Soap is environmental friendly 19- Dazonium salts are hazardous compounds that should be handled with high level of caution because a. They're known to explosively decompose at a temperature exceeding 5C to liberate nitrogen gas b. Too low temperatures can cause dryness that can bring about explosions among isolation C. None of the above d. Both a and b are right