How do polar molecules respond when they are placed between two metal plates one positively charged and one negatively charged ? a the molecules online and the electric field be the molecules joined together form in one large molecule see the molecules break apart as atoms migrate to the two plates d the molecule spin in circles

The molecules align with the electric field

Explanation:

Polar molecules have dipoles (parts of the molecules have partial charges). This is because the atoms with a larger atomic mass attract more of the electron cloud of the molecule hence become partially electronegative. The other part of the molecule becomes partially positive. Therefore these parts of the molecule will align with opposite charges including in this case based on the charged metal plates. The positive dipole will align with the negative plate while the negative dipoles will align with the positive plate.

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.