[tex]\huge\mathfrak\color{green}{Question}[/tex]
—When does chemical reaction occur and What are the factor that affect it?
[tex]\huge\sf\color{purple}{Answer}[/tex]
—Reactions occur when two reactant molecules effectively collide, each having minimum energy and correct orientation. Reactant concentration, the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.
Hope It Helps ^-^
