Bases and Physical Properties of Bases


 
 
Concept Explanation
 

Bases and Physical Properties of Bases

Bases:

These are the substances usually the oxide or the hydroxide of a metal, which can react with an acid to produce salt and water.They are bitter in taste.Substances containing a base are called basic substances.e.g.:

Sodium ;hydroxide rightarrow NaOH 

Calcium ;hydroxide; rightarrow Ca(OH)_2

Properties of Base:

  • Bases are bitter in taste.
  • Solutions of bases are slippery to touch.
  • Bases may or may not be soluble in water. Bases that can dissolve in water are called alkalis. For example, Sodium hydroxide,    potassium hydroxide
  • Bases are strong and corrosive.
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    Sample Questions
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    Question : 1

    Which of the following substance is basic?

    Right Option : D
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    Question : 2

    Colours of phenolphthalein indicator in acidic and basic medium, respectively are
     

    Right Option : B
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    Question : 3

    Bases are ________________ in taste.

    Right Option : B
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