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Question
Write notes on the properties of bases.
Answer in Brief
Solution
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They have a bitter taste.
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Their aqueous solutions have soapy touch.
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They turn red litmus blue.
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Their aqueous solutions conduct electricity.
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Bases react with metals to form a salt with the liberation of hydrogen gas.
Zn + 2 NaOH → Na2ZnO2 + H2↑ -
Bases react with non-metallic oxides to produce salt and water. Since this is similar to the reaction between a base and an acid, we can conclude that non-metallic oxides are acidic in nature,
Ca(OH)2 + CO2 → CaCO3+ H2O -
Bases react with acids to form salt and water.
KOH + HCl → KCl + H2O
The above reaction between a base and an acid is known as the Neutralisation reaction. -
On heating with ammonium salts, bases give ammonia gas.
NaOH + NH4Cl → NaCl + H2O+ NH3↑
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