There can be two, solid (Hail) and liquid (Water).
In osmosis, water moves from areas of low concentration of solute to areas of high concentration of solute.
Answer:
d). A catalyst lowers the activation energy for a chemical reaction.
Explanation:
From the given choices, it is true that a catalyst lowers the activation energy for a chemical reaction.
The activation energy is the energy barrier that must be overcome before a chemical reaction can occur.
Some reactions have very high activation energy and would not occur without the introduction of a catalyst.
The catalyst brings the reactants into contact by removing the energy deficiency in the system.
Single displacement is the type of chemical reaction
