Assertion : Both Be and Al can form complexes | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The electronic configuration of $Be$ is $1s^2 2s^2$. It has only $s$ and $p$ orbitals in its valence shell $(n=2)$.Since there are no vacant $d-$o

Vedclass · Accepted Answer

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The electronic configuration of $Be$ is $1s^2 2s^2$. It has only $s$ and $p$ orbitals in its valence shell $(n=2)$.Since there are no vacant $d-$orbitals available in the valence shell of $Be$,it cannot expand its coordination number beyond $4$.Therefore,$Be$ can form $BeF_4^{2-}$ but cannot form $BeF_6^{3-}$.$Al$ has $3d$ orbitals available,allowing it to form $AlF_6^{3-}$.Thus,both the assertion and the reason are correct,and the reason correctly explains why $BeF_6^{3-}$ is not formed.

Assertion : Both $Be$ and $Al$ can form complexes such as $BeF_4^{2-}$ and $AlF_6^{3-}$ respectively,$BeF_6^{3-}$ is not formed.
Reason : In case of $Be$,no vacant $d-$orbitals are present in its outermost shell.

Similar Questions

The species with spin only magnetic moment of $\sqrt{24} \ BM$ is

The domestic sewage in large cities

One of the products formed from the reaction of permanganate ion with iodide ion in neutral aqueous medium is

If $m$ and $M$ respectively denote the minimum and maximum of $f(x)=(x-1)^2+3$ for $x \in [-3, 1]$,then the ordered pair $(m, M)$ is equal to

One litre of oxygen at a pressure of $1 ~atm$ and two litres of nitrogen at a pressure of $0.5 ~atm$ are introduced into a vessel of volume $1 ~L$. If there is no change in temperature,the final pressure of the mixture of gas (in $atm$) is

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Assertion : Both $Be$ and $Al$ can form complexes such as $BeF_4^{2-}$ and $AlF_6^{3-}$ respectively,$BeF_6^{3-}$ is not formed.Reason : In case of $Be$,no vacant $d-$orbitals are present in its outermost shell.