polar or non polar?

Question

Which of the following designations, polar or nonpolar, are correct for the given compounds below ?
a) HBr : polar
b) CF4 : polar
c) CH3CH2CH2OH : nonpolar
d) I3- : polar

There can be more than one answer.

Answer 1

a) Molecules with a single H are polar

b) Most Carbon compounds are nonpolar

c) The OH group usually always gives a polar effect

d) Most elements form nonpolar molecules with themselves

Only a is correct.

Answer 2

a) correct ,linear molecule
b) incorrect, as the molecule is tetraedric
c) incorrect-ish, this is propanol and only the -OH end is polar
d) polar-ish, in the sense of being an ion

Answer 3

a) is correct.