Question

Beryllium shows diagonal relationship with aluminium. Which of the following similarity is incorrect?

• A. $B{e}_{2}C$ like$A{l}_4{C}_3$ yields methane on hydrolysis
• B. $Be$, like $Al$ is rendered passive by $HN{O}_3$
• C. Be$(OH{)}_2$ like $Al(OH{)}_3$ is basic
• D. $Be$ forms beryllates and $Al$ forms aluminate

Answer 1

The correct option is C Be$(OH{)}_2$ like $Al(OH{)}_3$ is basic

Diagonal relationship of Be with Al is because of small size. Be is different from other earth alkaline earth metals. But it resembles in many of its properties with Al. The $Be(OH{)}_2$ and $Al(OH{)}_3$ are amphoteric in nature. The two structures involve the only movement of electrons and not of atoms or groups, hence these are resonating structures.

Hence, the correct answer is option $\text{C}$.