Until recently, medicine and dentistry were thought to be unrelated. Scientists now understand that hundreds of bacteria species live in the human mouth and can enter the bloodstream and travel through
the body. This table describes four bacteria found in the mouth that scientists have linked to conditions
previously thought to be unrelated to oral health.
Bacteria Found in Human Mouth

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d.) circle motion requires a force to give it a centripetal acceleration.

d.) the average kinetic energy of the gas particles is greater in container b because its particles move faster.

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds

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.