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FAQs on Chemical Kinetics (Booklet) - Additional Documents & Tests for IIT JAM

1. What is chemical kinetics?
Ans. Chemical kinetics is the branch of physical chemistry that studies the rate at which chemical reactions occur and the factors that influence them. It involves the investigation of the reaction mechanisms, reaction rates, and the concentration of reactants and products over time.
2. How is the rate of a chemical reaction determined?
Ans. The rate of a chemical reaction is determined by measuring the change in concentration of either the reactants or the products over time. This can be done by monitoring the appearance or disappearance of a particular species using techniques such as spectrophotometry, titration, or by measuring the volume of gas evolved.
3. What are the factors that affect the rate of a chemical reaction?
Ans. Several factors can affect the rate of a chemical reaction, including: - Temperature: Increasing the temperature generally increases the rate of reaction as it provides more energy for the particles to collide and react. - Concentration of reactants: Higher concentrations of reactants lead to more frequent collisions and therefore a higher rate of reaction. - Catalysts: Catalysts increase the rate of reaction by lowering the activation energy required for the reaction to occur. - Surface area: Increasing the surface area of solid reactants increases the rate of reaction as it provides more contact points for collisions to occur.
4. What is the collision theory in chemical kinetics?
Ans. The collision theory is a concept in chemical kinetics that explains how chemical reactions occur at the molecular level. According to this theory, for a reaction to occur, the reactant molecules must collide with sufficient energy (activation energy) and in the correct orientation. The frequency, energy, and orientation of these collisions determine the rate of reaction.
5. What is the order of a chemical reaction?
Ans. The order of a chemical reaction refers to the power to which the concentration of a reactant is raised in the rate equation of the reaction. It determines how the rate of reaction depends on the concentration of the reactants. The order can be zero, first, second, or even fractional. The overall order of a reaction is the sum of the individual orders of the reactants.
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