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(i) Why alkaline earth metals, can not be obtained by reduction of their oxides? 

(ii) Why the elements of group 2 are known as alkaline earth metals?

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(i) The alkaline earth metals can not be obtained by reduction of their formation because the enthalpies of formation of these oxides are quite high and consequently they are very stable to heat.

(ii) The elements of group 2 are known as alkaline earth metals because their oxides and hydroxides are alkaline in nature and these metal oxides are found in the earth’s crust.

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