WINONA STATE UNIVERSITY
Sample Test 1 (Chapters 1-5) 200 points
Dr. Myoung Eun Lee
Name ______
Please circle one: Chemistry 106 or Chemistry 107
Instruction: Please use the Scantron provided and turn in the Scantron and the periodic table only. Please keep the test for your record.
1. A sulfur atom needs to gain ______electrons to become a sulfide ion.
(a) 1 (b) 2 (c) 3 (d) 4
2. When a covalent bond has a partial positive charge (d+) and a partial negative charge (d-), it is said to be ______.
(a) nonpolar (b) polar (c) hydrophobic (d) ionic
3. Which substance has ionic bonds between atoms?
(a) CO2 (b) NCl3 (c) H2S (d) KF
4. The formula of an ionic compound formed from aluminum ion and nitrate ion is______.
(a) AlN (b) Al(NO3)3 (c) AlNO3 (d) Al(NO3)2
5. How many structural isomers are there for propane (C3H8)? ______
(a) only 1 (b) 2 (c) 3 (d) 4
6. Which of the following would be used to recognize an unsaturated hydrocarbon in its structural formula?
(a) presence of a lone pair electrons (b) presence of double or triple covalent bonds
(c) presence of single covalent bonds (d) presence of ions
7. What property of hydrocarbon is utilized to separate different hydrocarbons from crude oil?______
(a) difference in melting points
(b) difference in boiling points
(c) difference in density
(d) difference in color
8. Magnesium nitride is made up of magnesium ions and nitride ions. What is the expected formula of magnesium nitride? ______
(a) Mg2N3
(b) MgN2
(c) Mg2N
(d) Mg3N2
9. How many valence electrons does a sodium atom have? ______
(a) 1 (b) 2 (c) 3 (d) 4
10. Vulcanization is a process used to produce ______.
(a) cross-linkage in rubber
(b) softer and less elastic rubber
(c) double bonds in rubber
(d) ring structures in rubber
11 The man-made compounds which have been found to destroy the stratospheric ozone layer are ______.
(a) green house gases
(b) chlorofluorocarbons
(c) polyvinylchloride
(d) sulfur oxides
12. Which is not a pair of allotropes? ______
(a) diamond and graphite
(b) graphite and nanotube
(c) buckminsterfullerene and nanotube
(d) graphite and carbon dioxide
13. Commercially used plastic that have short side chains (four carbon atoms long) are ______.
(a) LDPE
(b) HDPE
(c) PVC
(d) PP
14. Polyethylene molecules are known as ______.
(a) condensation polymers
(b) addition polymers
(c) substitution polymers
(d) replacement polymers
15. Lead compounds were used in the past to increase the octane rating. They caused serious environmental damages, therefore, lead compounds had been replaced by ______for higher octane rating.
(a) ethanol
(b) methanol
(c) iron
(d) sulfur
16. Octane is the name for alkanes that contain ______carbon atoms.
(a) 4
(b) 6
(c) 8
(d) 10
17. All the bond angles of methane (CH4) are ______.
(a) 90o (b) 100 o (c) 109.5 o (d) 120 o (e) 180 o
18. Which atom has the greatest number of valence electrons? ______
(a) carbon (b) oxygen (c) nitrogen (d) fluorine
19. What is the basis of stability of a noble gas, neon (Ne)? ______
(a) the octet of electrons in the valence shell
(b) the octet of electrons in the inner shell
(c) the sharing of eight electrons between two neon atoms to form Ne2
(d) the presence of seven valence electrons in the outer shell
20. Which of the following is a halogen? ______
(a) Ar (b) O (c) K (d) Br
21. What is the electron configuration of a phosphorus atom? ______
(a) 2, 8, 1 (b) 2, 8, 3 (c) 2, 8, 5 (d) 2, 8, 7
22. An atom with 9 protons and 10 neutrons is ______.
(a) F-18 (b) F-19 (c) Ne-19 (d) Ne-20
23. Carbon tetrachloride molecule has a ______shape.
(a) linear (b) bent (c) triangular (d) tetrahedral
24. The polymer polypropylene is prepared from the following monomer ______.
(a) vinyl chloride (b) ethylene (c) propylene (d) methyl chloride
25. Graphite is an excellent lubricant because of its ______.
(a) planar sheet structure
(b) linear chain structure
(c) three-dimensional ring structure
(d) cross-linked chain structure
26. Polyvinyl chloride is a rigid plastic. A ______is added to PVC to make it flexible.
(a) copolymer
(b) monomer
(c) softener
(d) plasticizer
27. A plastic that can be heated and reshaped repeatedly is called ______.
(a) thermosetting
(b) thermoplastic
(c) low density polymer
(d) high density polymer
28. A common industrial and domestic solvent, methylene chloride, has a formula of _____.
(a) CH3Cl
(b) CH2Cl2
(c) CHCl3
(d) CH2Cl3
29. Which represents the balanced chemical equation for the incomplete combustion of propane (C3H8)?
(a) 2C3H8 + 5O2 -> 3CO + 4H2O
(b) 2C3H8 + 7O2 -> 6CO + 8H2O
(c) 2C3H8 + 9O2 -> 6CO + 8H2O
(d) 2C3H8 + 11O2 -> 6CO + 8H2O
30. Gasoline used in automobiles is a(n) ______.
(a) element
(b) pure compound
(c) homogeneous mixture
(d) heterogeneous mixture
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