Beryllium and aluminum exhibit many properties which are similar. But the two elements differ in:

maximum covalency in compounds

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exhibiting amphoteric nature in their oxides

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forming covalent halides

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forming polymeric hydrides

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Solution

The correct option is A maximum covalency in compounds
$B e$ exhibits maximum covalency of four whereas $A l$ shows maximum covalency of six.

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Be and Al exhibit many properties which are similar, but the two elements differ in:

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