Question

L...docx 12. Molecule A) has a melting point 200 °C below molecule B) H₂C[ CH3 A. H₂C CHE 150 This is the result of a) total number of weak interactions present in B b) their solubility in water c) the uniqueness of the chemical bonds in molecule B d) the polarity of the bonds in molecule B 13) The largest single use of plastics is in the field of: a) construction materials b) consumer products c) packaging d) automobiles 14) 4C (carbon 14) is used to determine: a) shelf life of a product b) quantity of non-fossil carbon in a product c) the tensile strength of a material d) the ceramic behavior of a material 15) A polymer's mechanical strength could drop significantly every time it gets really humi because: b) the polymer is hydrophobic a) water plasticizes the polymer c) the polymers chains are getting closer together d) the material gets stiffer 16) Changing the molecular weight of the polymer will alter: a) the energy to process it b) its stress-strain behavior c) its color d) the type of intermolecular forces e) a & b only f) all the above

Answer 1

Question 12 as molecule A & B both are hydrocarbon so have only weak vanderwall forces as intermolecular forces but vanderwall forces are directly proportional to molecular weight as we can see from formula B have 150 times higjer molecular weight than A so give rise to high intermolecular vanderwall forces

Ans A total no. Of weak interaction present in B

Question 13.

Ans C packaging

as all oue daily use products are wrapped is plastic bags which are basically polyethene

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