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1 | |
Which one of the following is most likely to form an anion in an ionic compound? |
| | A) | Al |
| | B) | N |
| | C) | O |
| | D) | C |
| | E) | Xe |
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2 | |
What is the correct number of dots surrounding the Na symbol in the Lewis structure of Na+? |
| | A) | 0 |
| | B) | 1 |
| | C) | 2 |
| | D) | 6 |
| | E) | 8 |
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3 | |
Which of the following equations represents the lattice energy of KCl(s)? |
| | A) | Cl2(g) + 2 K+(s) ----> 2 KCl(s) |
| | B) | 2 KCl(s) ----> 2 K(s) + 2 Cl-(g) |
| | C) | KCl(s) ----> K(s) + Cl(g) |
| | D) | KCl(s) ----> K+(g) + Cl-(g) |
| | E) | None of the above. |
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4 | |
The formula for a compound of Cl that contains both ionic and covalent bonds is: |
| | A) | CCl4 |
| | B) | NaCl |
| | C) | NH4Cl |
| | D) | PCl3 |
| | E) | CH3Cl |
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5 | |
Which of the following has the correct Lewis structure? |
| | A) | H2O2: H:O:::O:H |
| | B) | | C2H2: |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq5a.gif','popWin', 'width=104,height=82,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | C) | | HCN: |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq5b.gif','popWin', 'width=96,height=83,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | D) | | KCl: |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq5c.gif','popWin', 'width=84,height=83,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | E) | | HCl: |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq5d.gif','popWin', 'width=84,height=83,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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6 | |
Which of the following chemical bonds would be the most polar? |
| | A) | H-O |
| | B) | H-C |
| | C) | N-S |
| | D) | N-Cl |
| | E) | C-O |
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7 | |
Which of the following is/are correct Lewis structures for C2H6? |
| | A) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq7a.gif','popWin', 'width=211,height=166,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | B) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq7b.gif','popWin', 'width=178,height=147,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | C) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif:: ::/sites/dl/free/0072410671/17477/ch9quizbq7c.gif','popWin', 'width=186,height=104,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | D) | A and B. |
| | E) | A and C. |
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8 | |
In which substance shown below does the central atom have the lowest formal charge? Assume that the Lewis structure for each species obeys the octet rule. |
| | A) | NO3- |
| | B) | CO32- |
| | C) | SO3 |
| | D) | ClO3- |
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9 | |
When acting as a central atom, which of the following cannot expand its octet? |
| | A) | P |
| | B) | C |
| | C) | Cl |
| | D) | Xe |
| | E) | S |
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10 | |
Estimate the enthalpy change for the reaction C2H6(g) + Cl2(g) ----> C2H5Cl(g) + HCl(g) , given the following bond energies: BE(C-H) = 414 kJ/mol; BE(C-C) = 347 kJ/mol; BE(C-Cl) = 327 kJ/mol; BE(H-Cl) = 431 kJ/mol; BE(Cl-Cl) = 242 kJ/mol. |
| | A) | -113 kJ |
| | B) | -68 kJ |
| | C) | -102 kJ |
| | D) | -344 kJ |
| | E) | 276 kJ |
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