(A) $Be$ and $Al$ exhibit a diagonal relationship,leading to many similar properties. Both metals form covalent compounds and their chlorides act as L

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Both form basic oxides and hydroxides.

(A) $Be$ and $Al$ exhibit a diagonal relationship,leading to many similar properties. Both metals form covalent compounds and their chlorides act as Lewis acids. Both metals dissolve in alkalies to form soluble complexes (beryllates and aluminates). The oxides and hydroxides of both $Be$ and $Al$ are amphoteric in nature,not basic. Therefore,the statement that both form basic oxides and hydroxides is incorrect.

Class 11 Chemistry Classification of Elements and Periodicity in Properties Chemical Reactivity

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$Be$ and $Al$ show similarities in properties due to the diagonal relationship except in the property $X$ given below. What is $X?$

AP EAMCET 2018 All AP EAMCET

A
Both form basic oxides and hydroxides.
B
Ions of both have a strong tendency to form complexes.
C
In the vapour phase,chlorides of both have $Cl^{-}$ bridged chloride structure.
D
Chlorides of both are soluble in organic solvents.