B Reflections of Light in Contact lens

The short answer is "yes". The exact reflection depends on the material the contact is made out of.
examples: http://www.ncbi.nlm.nih.gov/pubmed/3231673

But can contact lenses be uncoated? i.e. what about the liquid on your eyes, does that coat the contact lens?

 

It depends on what the contact lens is made of- there are lots of 'flavors':
http://www.allaboutvision.com/contacts/faq/contact-materials.htm

And as Simon Bridge points out, there is a tear film that cover the lens when it is in your eye, so the refractive index mismatch is fairly small.

 

Tear refractive index between 1.334 and 1.336 (±0.0011) depending on salt content.
http://www.ncbi.nlm.nih.gov/pubmed/8570161

Refractive index of "soft" contact lenses about 1.412 to 1.424 (±0.0005 typ uncertainty) depending on material.
http://www.ncbi.nlm.nih.gov/pubmed/20009942

Maybe there is a thin-film interference question in there?
The lens has tear-water either side of it about 2.3##\mu## m thick.
http://www.otticamartini.it/wp-content/uploads/2014/03/68.full_.pdf
... the hydrogel contacts in the above paper are typically 5-6##\mu## m thick.

Unsurprisingly these things are studied in painstaking detail.