Water is poured into an ice tray and placed in a freezer. Which of the following best describes what will happen to the molecules of water? A. The molecules will speed up in motion B. The molecules will not change in movement C. The molecules will slow down in movement D. The molecules will get speed up and get further apart

c

Explanation:

as solids have a slower movement of atoms compared to liquids

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.