11) Which is the BEST example of refraction? A) An image appears that is exactly like the real object. B) When put into a container, two mediums do not mix together. C) A laser beam looks bent when it passes through glass blocks. D) A concave lens causes an object to appear larger than its actual size.

1. they vary with a higher number because boiling is way hotter than melting

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.

the dissolution of polymer can be thermodynamically described in 2 steps.