Compound X has a boiling point of -6°C while compound Y has a boiling point of +12°C and compound Z has a boiling point

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Compound X has a boiling point of -6°C while compound Y has a
boiling point of +12°C and compound Z has a boiling point of
-55°C
a) List the compounds in order from most volatile to least
volatile
b) Compare the strength of the intermolecular forces in each of
these compounds
c) compound Y is soluble in water but compounds X and Z are not.
Use this information to decide whether the molecules are polar or
non-polar. Give a reason why