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III.<br />
IV.<br />
a. I and II<br />
b. II, III, and IV<br />
c. III and IV<br />
d. II and III<br />
e. I, II, and III<br />
____ 197. Which of the following molecules can NOT exist?<br />
a. PI5<br />
b. BeF2<br />
c. SF2<br />
d. CF3<br />
e. N2O<br />
____ 198. Which of the responses lists only the molecules below that have polar covalent bonds?<br />
HI, I2, S8, KCl<br />
a. HI and KCl<br />
b. I2<br />
c. S8<br />
d. I2 and KCl<br />
e. HI<br />
____ 199. Which molecule has the most polar covalent bond?<br />
a. IBr<br />
b. HCl<br />
c. N2<br />
d. H2<br />
e. PH3<br />
____ 200. Which one of the following molecules contains bonds that are the most polar?<br />
Electronegativities: H = 2.1, Be = 1.5, B = 2.0, N = 3.0, F = 4.0, S = 2.5, Br = 2.8, I = 2.5)<br />
a. SF6<br />
b. BI3<br />
c. BeBr2<br />
d. NH3<br />
e. NF3<br />
____ 201. Which one of the following molecules does not have a dipole moment?<br />
a. IBr<br />
b. NO
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