According to the collision theory, when can a chemical reaction occur? When enough activation energy is added to correct the orientation of the particle collisions
When reactants collide with enough energy to intersect their valence shells and form new bonds
When reactants collide with enough mass to form new bonds and break apart the reactants
When the proper catalyst is added to break the chemical bonds in the reactants.

Answer is A

Explanation:

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.