Question

Which one of the following theories is not related to the chemical kinetics?
A. Collision theory
B. Absolute theory
C. Absolute reaction rate
D. VSEPR theory

Answer 1

Chemical kinetics is a branch of physical chemistry that deals with the rate of a chemical reaction. It decides the order of a reaction and hence defines the rate of the reaction. Many theories are needed for the postulation of chemical kinetics.

Complete step by step solution:
- Chemical formula gives us the information about the total number of atoms in a molecule of the compound, the number of various atoms in 1 molecule of the compound, composition of the molecules of the compound but not about the state of the molecules of the compound.
-After knowing the chemical formula, we need to see the chemical reaction or the chemical equations in which the compounds link to form different products. The reaction of the same 2 compounds can result in different products depending on several factors like the concentration of the reactants, temperature of the reaction, pressure of the reaction and certain catalysts.
-Order of a reaction is responsible for the type of reaction that occurs between the different products. It decides the mechanism of the reaction and so different products obtained through the reactants are the same.
-All of it is explained under chemical kinetics. It tells us about the speed of a reaction, the yield of the products, the mechanism involved in the reaction, the transition states during the reaction, etc. Different theories formulate that including collision theory, absolute theory and absolute reaction rate.
-VSEPR theory does not represent the information about the chemical kinetics. It is a theory that tells us about the shape and geometry of the compounds, the hybridization state of the atoms of the compounds and how they mix together to form a compound.

Therefore the correct option is D.

Note: Chemical kinetics is a different branch from thermodynamics. In the latter, we deal with the direction in which a certain reaction or a process occurs and not the rate of that reaction or process.