Question

chemical reaction and equations class 10 notes​

Answer 1

Answer:

Chemical reactions and Equations

Balanced and unbalanced chemical equations and balancing of chemical equations.

What is chemical reaction?

The transformation of chemical substance to another chemical substance is known as chemical reaction.

FOR EXAMPLE - Rusting of iron , the setting of milk into curd , digestion of food , respiration exactra.

In a chemical reaction , a new substance is formed which is completely different in properties from the original substance , so in a chemical reaction , a chemical change tekes place.

FOR EXAMPLE - The burning of magnesium in the air to form magnesium oxide is an example of a chemical reaction.

Reactant

Substances which take part in a chemical reaction are called reactants.

FOR EXAMPLE - Mg and O2

Product

New substance formed after a chemical reaction are called product.

FOR EXAMPLE - MgO

Characteristics of chemical reaction

1. Evolution of gas
2. Change in colour
3. Change in state of substance
4. Change in temperature
5. Formation of precipitate

What is chemical equation

Representation of Chemical Equations using formula and symbols of the substances is called Chemical Equations.

FOR EXAMPLE - A + B = C + D

Balanced Chemical Equation

A balanced chemical equation has the number of atoms of each elements equal on both side.

Unbalanced Chemical Equation

If the number of atoms of each elements ine reactants is not equal to the number of atoms of each elements present in the products , then the Chemical Equation is called Unbalanced Chemical Equation.

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Answer 2

Answer:

balanced and imbalanced, as well as balancing chemical equations

Chemical reactions are defined as the transition of one chemical substance into another.

Explanation:

Equations and Chemical Reactions

Chemical equations that are balanced and imbalanced, as well as balancing chemical equations.

What is the definition of a chemical reaction?

Chemical reactions are defined as the transition of one chemical substance into another.

FOR EXAMPLE: rusting of iron, curdling of milk, digestion of meals, and exactra respiration.

A chemical reaction results in the formation of a new material with properties that are completely different from the original substance; thus, a chemical change occurs.

A CHEMICAL REACTION, FOR EXAMPLE, is the combustion of magnesium in the air to produce magnesium oxide.

Reactant

The reactants are the substances that participate in a chemical reaction.

Mg with O2, FOR EXAMPLE

Product

Product refers to the new substance created by a chemical process.

MgO, FOR INSTANCE

Chemical reaction properties

Gases evolve.

Color alteration

Substance transformation

Temperature fluctuations

Precipitate formation

What is the definition of a chemical formula?

Chemical Equations are the representation of chemical equations using the substance's formula and symbol.

In a chemical reaction, a new substance is generated with properties that are completely different from the original substance; thus, a chemical change occurs.

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