(no links or ill report) what is a Subduction zone?

A ) Where less dense oceanic crust pushes underneath more dense continental crust.

B ) Where plates diverge.

C ) Where more dense oceanic crust pushes underneath less dense continental crust.

D ) Where plates transform.

h let me think

listen, you cant how young you were.

"you didn't chose the stud life. the stud life chose you."

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.

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )