Bases and Physical Properties of Bases
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.:
Properties of Base:
Preparation:
When metals burn in oxygen the respective metallic oxides are formed. These are basic in nature.
The oxide when dissolved in water give their respective hydroxide.
But there are other metallic hydroxides like Cupric hydroxide, Ferric hydroxide, etc. These cannot be obtained by the above method.
Which of the following are correct ? (a) Bases are the substances usually the oxide or the hydroxide of a metal, which can react with an acid to produce salt and water (b) Bases are bitter in taste | |||
| Right Option : C | |||
| View Explanation | |||
Which of the following are correct : (a) Bases are the substances usually the oxide or the hydroxide of a metal (b) Bases that can dissolve in water are called alkalis. like, Sodium hydroxide. (c) Bases turn colourless phenophthalein to pink and orange coloured methyl orange indicator to yellow. | |||
| Right Option : D | |||
| View Explanation | |||
Colours of phenolphthalein indicator in acidic and basic medium, respectively are | |||
| Right Option : B | |||
| View Explanation | |||
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