Which one is it (it’s multiple choice too) a. gases have a definite volume and a definite mass.

b. gases hold the shape of their container and feel firm to touch.

c. gases spread out most and take up any available space.

d. gases do not spread out and they do not take up space.

this is a question from my edpuzzle any help will do <3

(the subject is science but since that’s not an option chemistry is the closest)

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.