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Prefix ‘alkali’ for alkali metals denote...

Prefix ‘alkali’ for alkali metals denotes

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Alkali metals derived frok arabic owrd alqis meaning plant ashes since ashes of plants are particlulary rich in carbonates of sodium and potassium
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The oxides of alkali and alkali earth metals are basic and the their strenght increases down the group. The solubility of carbonates and sulphates of alkali and earth metals shown opposite trends. Only the carbonates of Li and alkaline earth metals decompose on heating. The bicarbonates of both alkali and alkali earth metals on heating give carbonates indentify the correct order of thermal stablities

The oxides of alkali and alkali earth metals are basic and the their strenght increases down the group. The solubility of carbonates and sulphates of alkali and earth metals shown opposite trends. Only the carbonates of Li and alkaline earth metals decompose on heating. The bicarbonates of both alkali and alkali earth metals on heating give carbonates The correct decreasing order of basic character of the oxides is