help me pls...chemistry?

[Puka]

At which of the following temperature and pressure would a real gas be most likely to deviate from ideal behavior
Temp. (K) Pressure (atm)
a) 100 50
b) 200 5
c) 300 0.01
d) 500 0.001
e) 500 1

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Which of the following best explains why the normal boiling point of CCl4(l) (350K) is higher than the normal boiling of CF4(l) (145K)?
a) The C-Cl bond in CCl4, are less polar than the C-F bond in CF4
b) The C-Cl in CCl4 are weaker than C-F bonds in CF4
c) The mass of CCl4 molecule is greater than that of CF4 molecule
d) The electron cloud of the CCl4 molecule is more polarizable than that of the CF4 molecule/
e) The bonds in the CCl4 molecule are covalent, whereas the bonds in the CF4 molecule are ionic