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FAQs on Question Bank: Chemical Kinetics - Chemistry Class 12 - NEET

1. What is chemical kinetics?
Ans. Chemical kinetics is the branch of chemistry that deals with the study of the rates of chemical reactions and the factors that affect them. It focuses on understanding the speed at which reactants are converted into products, as well as the mechanisms by which these reactions occur.
2. What are the factors that affect the rate of a chemical reaction?
Ans. Several factors can influence the rate of a chemical reaction. These include the concentration of reactants, temperature, surface area, presence of a catalyst, and the nature of reactants. Increasing the concentration of reactants, raising the temperature, and using a catalyst can generally increase the reaction rate, while decreasing the surface area or changing the nature of reactants can slow it down.
3. How can we determine the rate of a chemical reaction experimentally?
Ans. The rate of a chemical reaction can be determined experimentally by measuring the change in concentration of reactants or products over time. This can be done by monitoring the change in color, pH, or conductivity, or by using techniques such as spectrophotometry or gas chromatography. By measuring the initial rate of the reaction under different conditions, the rate equation and rate constant can be determined.
4. What is the difference between rate constant and rate of reaction?
Ans. The rate constant is a proportionality constant that appears in the rate equation of a chemical reaction. It represents the speed at which the reaction occurs and is influenced by factors such as temperature and presence of a catalyst. On the other hand, the rate of reaction refers to the change in concentration of reactants or products per unit time. It can be determined experimentally and is affected by the concentration of reactants, temperature, and other factors.
5. What is the order of a chemical reaction?
Ans. The order of a chemical reaction refers to the exponent or power to which the concentration of a reactant is raised in the rate equation. It determines how the rate of the reaction changes with changes in the concentration of reactants. The order can be zero, first, second, or even fractional, and it is determined experimentally. The overall order of a reaction is the sum of the individual orders of each reactant.
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