Please help me on the question below. I will give to you if you answer it right (Not from google basically in ur own words) 5.What is the difference between magnetic stripping and magnetic field reversal?
6.What are the two types of crust that form the tectonic plates?
7.Fossils of sea creatures have been found near the top of Mount Everest (8848m above the sea level). How do you think they could have got there?

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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.

i think is conclusions.i think so