How to make equations more informative


 
 
Concept Explanation
 

How to make equations more informative

How to make equations more informative:

  • The physical states of the reactants and the products are indicated by using symbols like s, l, g and aq in brackets after their symbols or formulae where s stands for solid, aq stand for aqueous solution, l for liquid and g for gas. Thus the equation may be expressed as 
  • If a gas is evolved in the reaction, it is shown by an upward arrow line (­) after the products
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    Sample Questions
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    Question : 1

    Which of the following are correct :

    (a) If a gas is evolved in the reaction, it is shown by an upward arrow line ( ­) after the products.

    (b) If a perceptible is formed, it is shown by a downward arrow line(  ↓ ) after the product.

    (c) Evolution or absorption of heat during the reaction is shown by writing the thermochemical equation.

    Right Option : D
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    Explanation
    Question : 2

    What does symbol 's' in a bracket represents for in a chemical equation ?

    Right Option : A
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    Explanation
    Question : 3

    What does symbol 'g' in a bracket represents for in a chemical equation ?

    Right Option : B
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    Explanation
     
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