Question

What happens when calcium oxide react s with water

Answer 1

heya

here is ur answer

➡ (CaO) + H2O ----->CA(OH)2 + Q


➡so when calcium oxide react with water it form calcium hydroxide

➡the given reaction is an exothermic reaction

➡heat energy is liberated

➡so v write +Q in the RHS of equation

hope it helps...!!

Answer 2

calcium oxide reacts with water to give calcium hyderoxide which is also called as slaked lime and heat is release it is also called as exothermic reaction
and
it is chemical combination reaction
A+B - AB