NEET UG » NEET UG Study Material » Chemistry » Knowing More on Basic Concepts Of Chemical Reactions

Knowing More on Basic Concepts Of Chemical Reactions

A chemical reaction is a process that happens when chemical bonds between atoms of reacting substances dissolve, followed by the production of newer chemical bonds between the rearranged atoms of the substance produced. Compounds that interact to produce new compounds are referred to as reactants, and the end result or end compound is called a product.

Chemical reactions 

Chemical reactions are the procedures that result in the formation of different substances with distinct properties. Chemical reactions cause environmental changes. Atoms are redistributed between reacting components during chemical reactions, resulting in the formation of new molecules with fundamentally different properties.

A chemical reaction provides us with information about the reactivity of a material. The substance may be involved in the reaction alone or in conjunction with other atoms or compounds, and an energy release generally follows it.

The most reactive elements and compounds are capable of spontaneous or explosive ignition. They often burn in both water and oxygen in the air. The temperature affects reactivity. Increasing the temperature provides more energy for a chemical reaction, which usually increases its chance.

The physical properties of a sample, its chemical purity, and the presence of extra compounds all affect a chemical reaction.

Properties displayed by chemical reactions

  • Chemical reactions only impact the positions of electrons in the creation and breaking of chemical bonds between atoms, and there is no change to the nuclei. Such reactions could be expressed using a chemical equation.
  • During a chemical reaction, new compounds are formed. To do this, the chemical bonds of the chemicals break, and the atoms that make up the substances divide and reorganise themselves into different compounds with different chemical bonds. 
  • Atoms are never produced or destroyed during chemical reactions. The identical atoms that exist in the reactants are also present in the products; they are merely rearranged in different sequences.

How to tell when a reaction has taken place?

Knowing the signals that a reaction has happened is useful, as you can’t see chemicals at the molecular level with your eyes. A chemical reaction is frequently followed by a temperature change, bubbling, a change in colour, and/or precipitate development.

There are five ways to detect whether a reaction has taken place or not. They are:

  • Change in colour
  • Formation of precipitate
  • Formation of gas
  • Change in temperature
  • pH change

Parts of a chemical reaction

In a chemical reaction, the elements that interact are referred to as reactants. The compounds formed as a result of the reaction are referred to as products. Chemists employ a symbolic description known as a chemical equation to express the reactants and products. The reactants are listed on the left side, the products are listed on the right side, and the reactants and products are divided by an arrow indicating which way the reaction progresses. 

While many chemical equations depict reactants generating products, in reality, the chemical reaction frequently goes in the other direction as well. There are no new atoms made or lost in a chemical reaction or a chemical equation (mass conservation), although chemical bonds between distinct atoms can be broken and established.

Balanced and unbalanced chemical equations

Unbalanced or balanced chemical equations are both possible. Although an unbalanced chemical equation does not account for mass conservation, it is frequently a suitable starting point because it identifies the products and reactants as well as the direction of the chemical reaction.

Role of chemical reactions in general life 

Chemical reactions are an important aspect of technology, pharmacology, and life itself. Smelting iron, burning fuels, manufacturing glass and pottery, making wine and cheese, brewing beer, etc., are just some of the examples of activities that require chemical reactions and have been used for several years.

Chemical reactions in nature may be a lot less regulated than in the lab, far more complex at times, and they typically occur whether you want them to or not.

Whether it’s a forest fire, the slow process of iron rusting in the presence of oxygen and water over the years, or the delicate way fruit ripens on a tree; the process of converting one set of chemical substances (the reactants) to another set of chemical substances (the products) is known as a chemical reaction.

Conclusion

A chemical reaction happens when compounds or substances undergo a chemical transition to generate new compounds or substances. Chemical equations express chemical processes using symbols and chemical formulae of the chemicals involved in the reaction.

faq

Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

What is a chemical reaction?

Chemical reactions are the processes that lead to the production of new compounds with unique characteristics. Envir...Read full

Give some examples of chemical reactions.

Some examples of chemical reactions are as follows: – ...Read full

What are the types of chemical reactions?

Some of the different types of chemical reactions are Combustion reaction, Decomposition reaction, Neutralisation re...Read full

Define the term reactant and product in a chemical reaction?

Reactants are molecules or chemical substances that react to generate a product. Product is the name given to the co...Read full