Which of the following is true about the metal boxes pictured below? A narrow vertically oriented red rectangle is labeled magnet. The top of the rectangle is labeled N and the bottom is labeled S. To the right are three small blue squares labeled 1 to 3. Square 1 is closest and is near the S end. Square 3 is slightly further away, but near the N end. Square 2 is furthest away and equidistant from the ends.
A. The magnetic force will be strongest on box #2.
B. The magnetic force will be weakest on box #3.
C. The magnetic force will be strongest on box #1.
D. The magnetic force will be weakest on box #1.

sry but any answer choices

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

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.