Question

What is the definition of the following:-
chemical reaction
decomposition
displacement
double displacement
exothermic
endothermic
photo chemical reaction
galvanising​
please reply me I will mark you brainlist

Answer 1

Answer:

1. A chemical reaction is a process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
2. A decomposition reaction can be defined as a chemical reaction in which one reactant breaks down into two or more products.
3. A displacement reaction is the one wherein the atom or a set of atoms is displaced by another atom in a molecule. For instance, when iron is added to a copper sulphate solution, it displaces the copper metal.
4. Those reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions. In double replacement reactions, the positive ions exchange negative ion partners. A double replacement reaction is represented by the general equation.
5. An exothermic reaction is a reaction in which energy is released in the form of light or heat.
6. Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
7. A photochemical reaction is a chemical reaction triggered when light energy is absorbed by a substance’s molecules.
8. Galvanization is the process of applying a protective layer of zinc on a metal. It is a very common method of preventing the rusting of iron. This can be done by dipping the metal to be protected in hot, molten zinc or by the process of electroplating.