aldehyde and ketone reactions

Question 1

what is an aldol reaction - addition and condensation

Answer 1

involves two aldehydes/ketones or aldehyde+ketone to product an aldol - an aldehyde and a alcohol
aldol condensation is when the alcohol group in product is eliminated and forms an alkene

Question 2

what is an enolate ion? what reaction is it present in?

Answer 2

aldol reaction - when the aldehyde/ketone is deprotonated to form a nucleophile - enolate form of the two resonance is more stable