JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in [Jamia Millia Islamia 2007]

(A)Exhibiting maximum covalency in compoundsCorrect
(B)Forming polymeric hydrides
(C)Forming covalent halides
(D)Exhibiting amphoteric nature in their oxides

Answer: (A)

Solution

Be and Al both form polymeric hydrides, covalent halides, and amphoteric oxides (B, C, D all shared, diagonal-relationship behaviours). They differ, however, in maximum covalency: Be, having only four valence

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Question ID VK-137657