Chemical Reactions and Equations Class 10 Questions Answers


Chemical reactions and equations are everywhere in the daily human lives, especially in the formation of daily life objects. The reactions ensure that new bonds are being created properly and different product molecules are in their proper order to form new substances. The chemical equations represent the formation of daily life objects with proper chemical representation like chemical formulas and equations.

What are Chemical Reactions?

Figure 1: Process of chemical reactions

No machine-readable author provided. Smokefoot assumed (based on copyright claims)., CatalysisScheme, marked as public domain, more details on Wikimedia Commons

The chemical reactions are the phenomenon where the chemical bonds of the reactant molecules are broken. It also ensures that new bonds are created and result in the formation of new substances. Chemical and physical changes are responsible for the occurrence of Chemical reactions.

What are some of the examples of Chemical Reactions?

Considering a chemical experiment, a candle is kept in a jar; it eventually burns and changes into some volatile chemicals due to the chemical reactions within the jar. In this example, it can be seen that the burning of the candle is experiencing a chemical change when it converted to liquid form of wax in real-time.

So, it can be said that a chemical reaction is a process that takes place when multiple molecules interact with each other and influence for the formation of a new product. Within the chemical reactions, the change generally occurs with the help of physical changes in the components. These processes are commonly called precipitation, colour change, and heat production.

Which Factors Influence Chemical Reactions?

Factors like, pressure, concentration, and temperature of the reactants are involved in the process of chemical reactions. The chemical reactions play an integral role in daily human lives, starting from its footfall in business industries, customs, and many other fields occurs in daily lives. Processes like, rusting in iron, pottery, and the fermentation of wines are prime examples of chemical reactions that have been taking place in real-time, in the daily human lives.

What are the Properties of Chemical Reactions?

Chemical reactions are seen everywhere in daily human lives and these can be spotted or observed by outlining a few properties of chemical reactions. In any chemical reaction evaluation of gases is the major property during the reaction. For example, when zinc and dilute sulphuric acid involve into chemical reactions then the reaction is characterized by formation of hydrogen during the reaction.

Chemical reactions also take place when there is a subtle hanged in the temperature within a certain surrounding, for example, when chemical reactions take place during the formation of slaked lime, the temperature of the lime water changes. In addition, other properties like, change of colour, state, and precipitation formation are observed while chemical reactions happen.

What are the Types of Chemical Reactions?

Figure 2: Types of chemical reactions

Chemical reactions can be categorized in multiple forms, based on the atoms and interacts with each other in real-time. First, a combustion reaction occurs in presence of air and result in oxide products. This reaction mostly depends on oxidizers that require fuels for burning during the preparation of products. After that, there is the decomposition reaction where a single component breaks down into multiple products due to certain changes in energy.

Figure 3: Displacement and Neutralization reaction

Another type of reaction is the neutralization reaction that happens between a base and an acid, results in salt and water as products. For example, reactions between hydrogen chloride and sodium hydrochloride undertake the process of neutralization reaction. In addition, combination ration is another specific type of reaction that takes place when two or more reactants are combined for the formation of a new product. Apart from that, there are other types of reactions like, displacement reaction, precipitation reaction, reduction, and oxidation reactions that are also seen in real-time.

Which are the concepts Regarding Chemical Equations?

Chemical equations are the symbolic representation of the physical and reacting entities present within the chemical reactions. The equations are generally used for representing chemical reactions on paper for further demonstrations. For example, if one has to showcase the chemical reaction between hydrogen and oxygen gases, it can be represented with the equation is −

$$\mathrm{2H_2 + O_2\:\rightarrow\:2H_2O}$$


The chemical reactions and equations are crucial components of daily human lives that can help in understanding how things are formed in real-time. In simple words, chemical reactions are tracking place everywhere, all the time in daily lives for the formation of new products in real-time. Chemical reactions can take place within two ions, molecules or atoms, and eventually forms a new bond.


Q1. Which two things are extremely essential for making changes in the chemical reactions?

Ans. Two or more molecules and the bonds between the atoms are two essential things for chemical reactions in real-time. These components are crucial for the breaking and creation of new molecules, especially during the creation of new products.

Q2. Are there any limitations attached to the process of chemical reaction in real-time?

Ans. Yes, there are limitations in chemical reactions as these are incapable of providing any information regarding the physical state of the reactants. Though it uses symbols in the process, there is no proper information about the chemical products during the reaction process.

Q3. Why chemical reactions should be balanced every time?

Ans. Chemical reactions should be balanced all the time because it needs to make number of reactants atoms equal to the number of atoms present in the product side. It eventually stabilizes the process of reaction in real-time making chemical reactions seamless in real-time.

Updated on: 17-Apr-2023


Kickstart Your Career

Get certified by completing the course

Get Started