1)Which of the following molecules has a nonzero dipole moment?
A. CO2
B. H2
C. C12
D. CH4
E. BF3
F. None of the above has a nonzero dipole moment
2) Which of the following would you predict to have the most ionic bond?
A. BeC12
B. HgC12
C. LiC1
D. BeF2
E. CsF
F. MgO
3)The structural unit -CO2H indicates
A. hydrocarbon D. ketone
B. alcohol E. carboxylic acid
C. aldehyde F. amine
4)When NaC1 is dissolved in H2O, the most important intermolecular forces that come into play are:
A. dipole-dipole D. ion-dipole
B. induced dipole-induced dipole E. ion-induced dipole
C. dipole-induced dipole F. None of the above
5)At what temperature can ice, water (liquid) and water vapor all coexist in equilibrium?
A. 0 °C D. -10 °C
B. 78 °C E. 0.01 °C
C. 100 °C F. None of the above
6)A mixture contains 1.00 moles N2, 4.00 moles of O2, 1.00 moles of Ar and 4.00 moles of Xe. What is the mole fraction of Xe in the
mixture?
A. 1.000 D. 0.400
B. 0.800 E. 0.200
C. 0.600 F. None of the above
7) When 5.63 g of CdBr2 are added to 100.0 g of H2O, the observed freezing point is -0.54 °C. Kf for H2O = 1.86 °C/molal. Which of
the following is most reasonable?
A. CdBr2 is insoluble in H2O
B. CdBr2 is completely dissociated in H2O
C. CdBr2 is moderately dissociated in H2O
D. CdBr2 is just barely dissociated in H2O
E. CdBr2 is a nonelectrolyte
8) To prepare an aqueous 0.1000 molal solution of NaC1, how many g of NaC1 must be added to 500.0 g of H2O?
A. 58.44 g D. 5.844 g
B. 29.22 g E. 0.100 g
C. 2.922 g F. None of the above