B. length
1. john rode 2 km on his bike. his sister sally
rode 3000 m on her bike. who rode the
farthest and how much farther did they tride?
2. lois wants to send a box of arranges to a
friend by mail. the box of oranges cannot
exceed a mass of 10 kg. if each orange has a
mass of 200 g, what is the maximum number
she can send?
3. walt grew 10 centimeters in 1 year. he is now
1.6 m tall. how tall was he 1 year ago?
mass

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.