The best answer choice here would be 'Combination'
Boiling is the process of converting a substance from liquid state to gaseous state. If the heating curve is reversed, the process also is reversed from converting gaseous state to liquid state. In this case, the reverse of boiling is condensation. So the answer is point of condensation.
Yes they can have a trace of polar in them
HCl :
hydrochloric acid
answer A
hope this helps!
