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प्रश्न
Give any three methods for preparation of bases.
लघु उत्तर
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उत्तर
1. From Metals: By direct action of oxygen on highly active metals.
\[\ce{2Mg + O2 -> 2MgO}\]
2. By Action of Water on Active Metals: Highly reactive metals react with water to form soluble hydroxides.
\[\ce{2Na + 2H2O -> 2NaOH + H2 ^}\]
3. By Thermal Decomposition: Heating certain metal carbonates yields metal oxides.
\[\ce{CaCO3 ->[\Delta] CaO + CO2 ^}\]
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