The melting point of RbBr is 682,^{circ}C whi | vedclass

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

Question

(D) The melting point of ionic compounds is inversely proportional to the internuclear distance $(r_c + r_a)$ between the ions.As the size of the ions

Vedclass · Accepted Answer

the internuclear distance,$r_c + r_a$ is greater for $RbBr$ than for $NaF$

Vedclass · Answer

(D) The melting point of ionic compounds is inversely proportional to the internuclear distance $(r_c + r_a)$ between the ions.As the size of the ions increases,the electrostatic force of attraction decreases,leading to a lower melting point.Since the ionic radii of $Rb^+$ and $Br^-$ are larger than those of $Na^+$ and $F^-$,the internuclear distance $(r_c + r_a)$ is greater for $RbBr$ than for $NaF$.Therefore,$NaF$ has a higher melting point than $RbBr$.

The melting point of $RbBr$ is $682\,^{\circ}C$ while that of $NaF$ is $988\,^{\circ}C$. The principal reason for this fact is

Similar Questions

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
$(a)$ $K$ and $S$
$(b)$ $Ca$ and $O$
$(c)$ $Al$ and $N$

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
$(a)$ $K$ and $S$
$(b)$ $Ca$ and $O$
$(c)$ $Al$ and $N$

The electronic configurations of elements are $A = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$ and $B = 1s^2 2s^2 2p^6 3s^2 3p^5$. Which of the following is the formula of the ionic compound that could be formed between these two elements $A$ and $B$?

In the Born-Haber cycle for the formation of solid common salt $(NaCl)$,the largest contribution to the stability of the crystal lattice comes from:

Among the following oxides,which has the maximum lattice energy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The melting point of $RbBr$ is $682\,^{\circ}C$ while that of $NaF$ is $988\,^{\circ}C$. The principal reason for this fact is

Similar Questions

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:$(a)$ $K$ and $S$$(b)$ $Ca$ and $O$$(c)$ $Al$ and $N$

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:$(a)$ $K$ and $S$$(b)$ $Ca$ and $O$$(c)$ $Al$ and $N$

The electronic configurations of elements are $A = 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$ and $B = 1s^2 2s^2 2p^6 3s^2 3p^5$. Which of the following is the formula of the ionic compound that could be formed between these two elements $A$ and $B$?

In the Born-Haber cycle for the formation of solid common salt $(NaCl)$,the largest contribution to the stability of the crystal lattice comes from:

Among the following oxides,which has the maximum lattice energy?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
$(a)$ $K$ and $S$
$(b)$ $Ca$ and $O$
$(c)$ $Al$ and $N$

Use Lewis symbols to show electron transfer between the following atoms to form cations and anions:
$(a)$ $K$ and $S$
$(b)$ $Ca$ and $O$
$(c)$ $Al$ and $N$