Question

Q7. The catalytic region in which a small portion of molecules are involved in catalysis is called-
a. duplication site
6. absorption site
c. active site
d. inactive site​

Answer 1

Catalysis (/kəˈtæləsɪs/) is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst[1][2] (/ˈkætəlɪst/). Catalysts are not consumed in the catalyzed reaction but can act repeatedly. Often only very small amounts of catalyst are required.[3] The global demand for catalysts in 2010 was estimated at approximately US$29.5 billion.[4]

An air filter that utilizes a low-temperature oxidation catalyst to convert carbon monoxide to less toxic carbon dioxide at room temperature. It can also remove formaldehyde from the air.

In chemistry, heterogeneous catalysis is catalysis where the phase of catalysts differs from that of the reactants[1] or products. Contrasts with homogeneous catalysis where the reactants, products and catalyst exist in the same phase. Phase distinguishes between not only solid, liquid, and gas components, but also immiscible mixtures (e.g. oil and water), or anywhere an interface is present. Catalysts are useful because they increase the rate of a reaction[2] without themselves being consumed and are therefore reusable.

Hydrogenation of ethene on a catalytic solid surface (1) Adsorption (2) Reaction (3) Desorption

Heterogeneous catalysis typically involves solid phase catalysts and gas phase reactants.[3] In this case, there is a cycle of molecular adsorption, reaction, and desorption occurring at the catalyst surface. Thermodynamics, mass transfer, and heat transfer influence the rate (kinetics) of reaction.

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Answer 2

Answer:

The catalytic region in which a small portion of molecules are involved in catalysis is called active site.

Explanation:

• The area of an enzyme's active site where substrate molecules attach and undergo a chemical reaction is known as the active site in biology and biochemistry. The binding site (binding amino acid residues) and residues that catalyze a reaction of that substrate are both components of the active site (catalytic site).
• A catalyst is a material that speeds up a chemical reaction without really being a reactant. Enzymes are the catalysts for biological reactions that take place in living things. Although certain ribonucleic acid (RNA) molecules also function as enzymes, proteins make up the majority of enzymes.
• The vital function of enzymes is to reduce the activation energy of a reaction, or the amount of energy required for the reaction to start.

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