Chemical Equation


Physical and Chemical Change II - Concepts
Class - 7th CBSE Subjects
 
 
Concept Explanation
 

Chemical Equation

Chemical equations:

A Chemical Equations is the shorthand form of representing a chemical reaction using symbols and formula. The element/compounds involved in the reaction are called reactants and the new elements/compounds formed are called the products. Steps to write the chemical equation:

1)    Identify the reactants and the products of the chemical reaction.

2)    Write the names of the reactants on the left hand side & products on the right hand side with a ‘+’ sign between them. Place arrow (--à) between the two sides. This equation is called word equation.

3)    Replace the names of the products and reactants with symbols & formulae. This gives chemical equation.

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Sample Questions
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Question : 1

Which of the following are correct ?

(a) A Chemical Equations is the shorthand form of representing a chemical reaction using symbols and formula.

(b) The element/compounds involved in the reaction are called products and the new elements/compounds formed are called the reactants.

Right Option : A
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Question : 2

________________ is the shorthand form of representing a chemical reaction using symbols and formula.

Right Option : A
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Question : 3

Complete the following equation of rusting of iron. Identify A and B:

Iron(Fe) + A + Moisture = B

Right Option : C
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