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FAQs on Surface Chemistry (Advanced) - Practice Sheet, Class 12, Chemistry - JEE

1. What is surface chemistry?
Ans. Surface chemistry is a branch of chemistry that deals with the study of chemical reactions that occur at the interface of two phases, usually between a gas and a solid or a liquid and a solid. It involves the study of various phenomena such as adsorption, catalysis, and corrosion, which are influenced by the surface properties of materials.
2. What is the significance of surface chemistry?
Ans. Surface chemistry is significant because it plays a crucial role in various industrial processes and natural phenomena. It helps in understanding the behavior of catalysts, designing efficient adsorbents, studying corrosion and electrochemistry, and developing drug delivery systems. It also has applications in fields like nanotechnology, environmental science, and material science.
3. What is adsorption in surface chemistry?
Ans. Adsorption is the process by which molecules or ions from a gas or liquid phase adhere to the surface of a solid or liquid. It occurs due to the attractive forces between the adsorbate and the adsorbent. Adsorption can be classified as physical adsorption (physisorption) or chemical adsorption (chemisorption), depending on the strength of interaction between the adsorbate and adsorbent.
4. How does surface chemistry affect catalysis?
Ans. Surface chemistry plays a crucial role in catalysis. Catalysis is the process of increasing the rate of a chemical reaction by the presence of a catalyst. The catalyst often provides a surface where reactant molecules can adsorb and react more easily. The surface properties of the catalyst, such as its surface area, composition, and activity, greatly influence the catalytic activity.
5. What are the applications of surface chemistry in everyday life?
Ans. Surface chemistry has various applications in everyday life. It is used in the production of detergents and soaps, where surface-active agents lower the surface tension of water, allowing better wetting and cleaning. It is also used in the development of drug delivery systems, where the surface properties of nanoparticles or micelles play a crucial role in drug release. Surface chemistry is also important in the development of new materials with desired properties, such as corrosion-resistant coatings and catalysts for automobile exhaust systems.
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