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JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Chemistry » How can a Positive Catalyst Alter a Reaction?

How can a Positive Catalyst Alter a Reaction?

A positive catalyst can alter the reaction rate by up to a factor of ten. If you are a chemistry enthusiast, then you would have definitely heard the word ‘catalyst’. Chemistry depends majorly on this word. If you notice chemical reactions closely, some reactions occur fast, while some reactions occur at a slow rate? This happens because of catalysts.In chemistry, these catalysts are characterised as those substances which modify the pace of any chemical reaction by changing the way they react. You can also say that for a good yield, a positive catalyst plays a vital role. The findings of this study provide an explanation for why some reactions occur faster than others. It also suggests that there may be potential applications for using positive catalysts in chemical and pharmaceutical manufacturing.

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A positive catalyst streamlines the process by lowering the activation energy barriers, enabling the transformation of a large number of precursor or reactant constituents into outputs and so boosting the proportion of extraction yield. Further in the post, we will find out how these powerful positive catalysts can change any reaction?

Meaning of Positive Catalysts

A positive catalyst is a substance that speeds up the reaction rate by up to a factor of ten. Positive impetuses or catalysts are those that accelerate the recurrence and speed of a reaction cycle.

There are some characteristics of a catalyst, which you need to know before understanding how they alter a chemical reaction –

  •     A catalyst must be able to react quickly with other chemicals in order for the reaction to take place.

  •     A catalyst’s surface area is important because it allows more reactants to come into contact with it, speeding up the reaction.

  •     A catalyst must be compatible with other chemicals involved in the reaction in order for it to work properly.

  •   When any chemical reaction is completed, the catalyst of that chemical reaction will regenerate to start the reaction cycle again. This characteristic of the catalyst is unique.

Before trying to understand the mechanism of catalysts, you need to understand the meaning of positive catalysts. Let’s take an example to understand it better.

During Haber’s process, when ammonia is prepared, iron oxide increases the reaction rate of formation of ammonia, or you can say that iron oxide acts as a positive catalyst to boost up the reaction rate.

N2 + 3H2 ↔ 2 NH3

The positive catalyst used in the above reaction is iron oxide (Fe2O3).

Haber’s process is a chemical reaction where nitrogen reacts with hydrogen to form ammonia as a final product. The reaction is catalysed at atmospheric pressure of 200, and the temperature ranges from 400 to 450 degrees celsius. On the other hand, the molecules or compounds which decrease the efficiency of the catalyst during the reaction process are known as catalyst poisons.

In the above reaction, you saw how iron oxide acts as a catalyst and enhances the reaction speed between nitrogen, and hydrogen so that they form ammonia as a byproduct. This shows the importance of the role of catalysts in any chemical reaction.

How Can Positive Catalysts Alter Reactions?

The investigation discovered that positive impetuses or catalysts can adjust the response rate by up to a component. This suggests that there may be potential applications of positive catalysts in chemical and pharma companies.

One possible explanation for this phenomenon is that positive catalysts increase the affinity of the reactants for each other. This increases the rate at which the reactants are converted into molecules of a product.

Let’s understand how these positive catalysts work to alter the reactions.

  •   Catalysts have a mechanism through which they enhance the rate of chemical reactions by speeding them up.

  •   In order for a reaction to take place, the chemicals involved must come into contact with each other.

  •   A catalyst helps increase the surface area of these chemicals, allowing more reactants to come into contact with them.

  •   As a result, the reaction rate increases, which further speeds up the reaction and makes it more efficient.

Catalysts facilitate processes to take place quickly by allowing them to shift to a lower-energy state. They do this by reducing the activation energy necessary to finish it.

Here are some positive catalysts that can speed up chemical reactions:

Oxygen: Oxygen is a common catalyst in many chemical reactions. It helps break down molecules and create new substances.

Nitrogen: Nitrogen is another common catalyst in many chemical reactions and also helps in breaking down molecules to create new substances.

Phosphorus: Phosphorus is a key component in many biochemical processes, including DNA replication and energy production. It also plays a role in the catalytic activity of enzymes.

Potassium: Potassium is important in biochemical reactions because it helps break down molecules. This process is known as catalysis.

Iron: Iron is a key element in many enzymes that are important in chemical reactions. It also helps catalyse the breakdown of molecules.

Sulphur: Sulphur is a common component in many enzymes and plays an important role in catalysis.

Chlorine: Chlorine is an essential element for both life and chemical reactions, playing a role in the catalytic activity of enzymes.

Iodine: Iodine is an essential element for both life and chemical reactions and also plays a role in the catalytic activity of enzymes.

Sodium: Sodium is an important element for many biochemical processes, including the breakdown of molecules by enzymes.

Conclusion

A positive catalyst can have a profound effect on the reaction rate. By understanding the effects of positive catalysts on reaction processes, anyone can predict the product yield. The study found that positive catalysts can alter the reaction rate and also speed up the process 10 times faster. This suggests that there may be potential applications for using positive catalysts in chemical and pharmaceutical manufacturing. The study was conducted by using a new method to measure the reaction rate, which revealed that positive catalysts can alter reaction rates.

faq

Frequently asked questions

Get answers to the most common queries related to the JEE Examination Preparation.

Why does the reaction speed rise per the adsorption hypothesis of catalysis?

Ans. It is believed that, according to the theory of catalysis, free valences on the catalyst’s surface are responsible for its potent...Read full

How is adsorption theory defined?

Ans. The adsorption principle states that adhesion results from molecule interactions and surface forces. A bond is formed when sticky molec...Read full

What Are The Adsorption Factors?

Ans.  Adsorbent’s nature: Different adsorbents can have varying degrees of absorption in the same gas. ...Read full

Why is it preferable to use heterogeneous catalysts?

Ans. Heterogeneous catalysts play a vital role in industrial chemical processing. They are preferred to make chemical processes more efficie...Read full

Ans. It is believed that, according to the theory of catalysis, free valences on the catalyst’s surface are responsible for its potential to catalyse chemical reactions. When one of the reactants is substantially adsorbed on the catalyst’s surface, the rate is inversely proportional to the reaction’s concentration. Reduced activation energy always increases reaction speed.

Ans. The adsorption principle states that adhesion results from molecule interactions and surface forces. A bond is formed when sticky molecules adsorb on a substratum, and the attractive forces that arise are often referred to as secondary forces.

Ans. 

  1. Adsorbent’s nature: Different adsorbents can have varying degrees of absorption in the same gas.
  2. Adsorbent surface area: The higher the surface area, the greater the adsorption capacity.
  3. Adsorption of the gas: The higher a gas’s critical temperature, the stronger the van der Waals forces of attraction, and consequently, the stronger the adsorption.
  4. Temperature difference: According to the Le-Chatelier law, increasing the temperature decreases adsorption and vice versa.
      1. Pressure: At constant temperature, adsorption rises with pressure.

Ans. Heterogeneous catalysts play a vital role in industrial chemical processing. They are preferred to make chemical processes more efficient because of their resilience and lower operating costs. This is especially true because of their ease of recovery and separation from the products.

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