Chem Quiz

1. (TCO 12) Celluloid is a chemical modification of which natural product? (Points : 2)

       Cells

       Ivory

       Cellophane

       Cellulose

       None of the above

Question 2. 2. (TCO 12) Which of the following statements about ethylene and polyethylene is true? (Points : 2)

       The polymer has the same properties as the monomer.

       The polymer has alternating double and single bonds between carbons, whereas the monomer has only single bonds between carbons.

       The polymer has alternating double and single bonds between carbons, whereas the monomer has only double bonds between carbons.

       The polymer has only single bonds between carbons, whereas the monomer has only double bonds between carbons.

Question 3. 3. (TCO 12) Natural rubber can be made from the monomer (Points : 2)

       ethylene.

       propylene.

       butadiene.

       isoprene.

       methylene.

Question 4. 4. (TCO 12) Which of the following statements about addition and condensation polymers is true? (Points : 2)

       Both addition polymers and condensation polymers contain all of the atoms of the monomers.

       Both addition polymers and condensation polymers lose some atoms from the original monomers when the polymer is formed.

       Addition polymers contain all of the atoms of the original monomers, but condensation polymers do not.

       Condensation polymers contain all of the atoms of the original monomers, but addition polymers do not.

Question 5. 5. (TCO 12) The monomer used to make Teflon is (Points : 2)

       H2C=CH2.

       Cl2C=CH2.

       H2C=CHCl.

       F2C=CF2.

       F2C=CHF.

 

Question 6. 6. (TCO 11) The process of positron emission can be considered as the (Points : 2)

       conversion of a neutron to a proton and a positron. The positron is emitted.

       conversion of a neutron to a proton and an electron. The electron is emitted.

       conversion of a proton to a neutron and a positron. The neutron is emitted.

       conversion of a proton to a neutron and a positron. The positron is emitted.

       conversion of a proton to a neutron and electron. The proton is emitted.

Question 7. 7. (TCO 11) Nitrogen-13 has a half-life of 10 minutes. How much of a 16 mg sample would remain after 20 minutes? (Points : 2)

       0.25 mg

       0.5 mg

       1 mg

       2 mg

       4 mg

 

Question 8. 8. (TCO 11) Sodium-24 has a half-life of 15 hours. How much of a 40 mg sample would remain after two half-lives? (Points : 2)

       0 mg

       2.5 mg

       5 mg

       10 mg

       20 mg

 

Question 9. 9. (TCO 11) Which physical state has the greatest entropy? (Points : 2)

       Solids have the greatest entropy.

       Liquids have the greatest entropy.

       Gases have the greatest entropy.

       Solids and liquids have the same entropy.

       All have the same entropy.

Question 10. 10. (TCO 11) The fact that a heat pump requires energy to move heat from a colder object (outside of the house) to a hotter object (inside of the house) is a real-life observation of which thermodynamic law? (Points : 2)

       The first law

       The second law

       The third law

       The fourth law

       None of the above

 

 

Question 11. 11. (TCO 11) Radon (Rn) has a mass number of 222 and an atomic number of 86 and decays by emission of an alpha particle. The product of this decay is (Points : 5)

       radium (Ra), with a mass number of 226 and an atomic number of 88.

       polonium (Po), with a mass number of 218 and an atomic number of 84.

       lead (Pb), with a mass number of 210 and an atomic number of 82.

       gold (Au), with a mass number of 212 and an atomic number of 79.

       astatine (At), with a mass number of 211 and an atomic number of 85.

Question 12. 12. (TCO 12) Discuss the chemical structural characteristics of polyethylene and styrene-butadiene rubber (SBR). (Points : 5)

            

 

Question 13. 13. (TCO 12) Describe two types of methods that can be used to mold plastic products. (Points : 5)

          

 

Question 14. 14. (TCO 11) Strontium (Sr), with a mass number of 90 and an atomic number of 38, decays by beta emission. Identify the product of the nuclear reaction by providing its atomic symbol (2 points), mass number (2 points), and atomic number (1 point). (Points : 5)