Which of the following has the lowest melting | vedclass

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

Question

(B) The melting point of alkaline earth metal fluorides depends on the lattice energy and the covalent character of the bond. $Be^{2+}$ has a very sma

Vedclass · Accepted Answer

$BeF_2$

Vedclass · Answer

(B) The melting point of alkaline earth metal fluorides depends on the lattice energy and the covalent character of the bond. $Be^{2+}$ has a very small ionic radius and high charge density,which causes significant polarization of the $F^-$ ion (Fajans' rule). This leads to a high degree of covalent character in the $Be-F$ bond compared to the other alkaline earth metal fluorides $(MgF_2, CaF_2, SrF_2)$,which are predominantly ionic. Due to this covalent nature and the polymeric structure of $BeF_2$,it exhibits a significantly lower melting point compared to the ionic fluorides of the other alkaline earth metals.

Which of the following has the lowest melting point?

Similar Questions

Which of the following statements is correct for any thermodynamic system?

Fusion reaction is initiated with the help of

If $E, M, J$ and $G$ respectively denote energy,mass,angular momentum,and universal gravitational constant,the quantity which has the same dimensions as the dimensions of $\frac{E J^2}{M^5 G^2}$ is:

The number of elements present in the fourth period is

In Earthworm,the dorsal wall of the intestine from the $26^{th}$ segment to the $95^{th}$ segment forms a median internal fold called:

Vedclass Test Series

Exam Paper Generator

Online Exam Module