30 points answer !

ingrid says that a red ball of clay appears red because the clay reflects red wavelengths. simon says that the clay appears red because it allows red wavelengths to pass through it.

which statement best explains who is correct?

ingrid is correct. the clay appears red because it is opaque.
ingrid is correct. the clay appears red because it is a type of matter.
simon is correct. the clay appears red because it is opaque.
simon is correct. the clay appears red because it is a type of matter.

the first one - "Ingrid is correct. The clay appears red because it is opaque."

Explanation:

because i say so.

(if it let red wavelengths pass through it, than it could be any colour besides red, we see the colour that is reflected)

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.

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.