Information conveyed by a chemical equation


 
 
Concept Explanation
 

Information Conveyed by a Chemical Equation

Information conveyed by a chemical equation:

  • It gives the symbols and formulae of the reactants and products.
  • It tells us which substance or substances are taking part in the reaction and which product or products are being obtained. For example the equation tells that calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide.
  • It gives the relative number of atoms and molecules of the reactants that take part in the reaction.
  • It tells us the relative number of the atoms and molecules of the products formed in the reaction.
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    Sample Questions
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    Question : 1

    Chemical equation tells us the relative number of the ___________________________ of the products formed in the reaction.

    Right Option : C
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    Explanation
    Question : 2

    Which of the following are correct :

    (a) Chemical equation gives the symbols and formulae of the reactants and products.

    (b) Chemical equation tells us the relative number of the atoms and molecules of the products formed in the reaction.

    Right Option : C
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    Explanation
    Question : 3

    Which of the following are correct :

    (a) Chemical equation gives the symbols and formulae of the reactants and products.

    (b) Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide.

    (c) Calcium carbonate reacts with Nitric acid to produce calcium chloride, water and carbon dioxide.

    Right Option : A
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    Explanation
     
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