____ 9. Under similar conditions, which of the following gases will behave less
ID: 845168 • Letter: #
Question
____ 9. Under similar conditions, which of the following gases will behave less like an ideal gas than the others?
a.
NH3
d.
H2
b.
HCl
e.
O2
c.
CH4
____ 10. Which of the following compounds would be most soluble in carbon tetrachloride, CCl4?
a.
H2O
d.
C6H6
b.
CH3OH
e.
HCl
c.
NH3
____ 11. A phase diagram shows the states of a substance as a function of _____ and _____.
a.
pressure, volume
d.
concentration, temperature
b.
volume, temperature
e.
density, pressure
c.
pressure, temperature
____ 12. At the point marked with a dot on the phase diagram, the solid will __________
a.
be indistinguishable from the gas.
d.
sublime.
b.
boil.
e.
liquify.
c.
melt.
____ 13. Which of the following substances has a solid whose freezing point will decrease with increasing pressure?
a.
c.
b.
d.
____ 14. The relative energies (strengths) of the intermolecular forces present in each of four different pure substances are shown in the figure below. Which substance is most likely to be a solid at room temperature?
a.
a
c.
c
b.
b
d.
d
____ 15. The temperature at point b in the phase diagram below is the __________
a.
critical point.
d.
normal freezing point.
b.
triple point.
e.
normal boiling point.
c.
transition point.
____ 16. Arrange the following compounds in order of increasing dispersion interactions: CCl4, CH4, C3H8.
a.
CH4 < C3H8 < CCl4
d.
CCl4 < C3H8 < CH4
b.
CCl4 < CH4 < C3H8
e.
CH4 < CCl4 < C3H8
c.
C3H8 < CH4 < CCl4
____ 17. Water contains about 42 mg of oxygen per liter at 20
a.
NH3
d.
H2
b.
HCl
e.
O2
c.
CH4
Temperature (C)Explanation / Answer
9) NH3 and HCl Ideal gas doesnot attract each other. This molecule has hydrogen bond so attraction will be there. Among this NH3 will be more hydrogen bond character so least ideal behaviour
10) C6H6 because CCl4 is nonpolar solvent. Since like disolves like that is nonpolar will disolves in nonpolar. so nonpolar C6H6 will disolves in CCl4
11) pressure and temperature graphs x and y axcis is defining they are varying pressure and temperature
12) will sublime because phase diagram marked point is boarder of solid and gas
13) d feature of graph in the liquid and solid boarder has oposit nature from others which tells decrease of freezing point on pressure increment
14) b) Inter molecular force more means substance likes to be excist as solid
15) e point lies in the boarder of liquid and gas
16) e C3H8 is unsymetrical so unbalanced dipole interaction is there CCl4 has less dispersion force than CH4 because of induced dipolemoment is more in CH4
17) b) 1.3
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