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  4. Al2O3 formation involves evolution of a large quantity of heat which makes its use in

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Q. $Al_2O_3 $ formation involves evolution of a large quantity of heat which makes its use in

The p-Block Elements

Solution:

For example, $Cr_2O_3 + 2 Al \rightarrow Al_2O_3 + 2 Cr$ involves $Al_2O_3$ formation and large amount of heat is evolved