Single Choice

Among $$LiCl, RbCl, BeCl_{2}$$ and $$MgCl_{2}$$, the compounds with greatest and least ionic character respectively are:

A$$LiCl, RbCl$$
B$$RbCl, BeCl_{2}$$
Correct Answer
C$$RbCl, MgCl_{2}$$
D$$MgCl_{2}, BeCl_{2}$$

Solution

According to fazan's rule, ionic character directly depends on the size of cation and charge on the cation and inversely depends on the size of anion. Since here the anion ($$Cl^-$$) is same, the ionic character depends only on the size and charge of the cation. Among the given chlorides, $$Rb$$ has the largest size and $$Be$$ has the smallest size. Hence, $$Be^{+2}$$ inspite of having greater charge (+2) will be least ionic because of very small size.
$$\therefore$$ $$RbCl$$ is most ionic and $$BeCl_2$$ is least ionic.

SIMILAR QUESTIONS

s - block Elements (Alkali and Alkaline Earth Metals)

Chloride of an element $$A$$ gives neutral solution in water. In the periodic table, the element $$A$$ belongs to the:

s - block Elements (Alkali and Alkaline Earth Metals)

Li does not resemble with other alkali metals in following properties:

s - block Elements (Alkali and Alkaline Earth Metals)

The correct order for increasing solubility of fluorides of alkali metals is_________.

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following is not hygroscopic?

s - block Elements (Alkali and Alkaline Earth Metals)

Why is LiF almost insoluble in water whereas LiCl soluble not only in water but also in acetone?

s - block Elements (Alkali and Alkaline Earth Metals)

Why does the reaction proceed better with $$ KF $$ than with $$ NaF $$?

s - block Elements (Alkali and Alkaline Earth Metals)

Arrange the following in order of the increasing covalent character $$ MCI, MBr, MF, MI $$ ( where M =alkali metal).

s - block Elements (Alkali and Alkaline Earth Metals)

Which of the following has the lowest melting point ?

s - block Elements (Alkali and Alkaline Earth Metals)

For two ionic solids $$ CaO $$ and $$ KI $$ identify the wrong statement among the following ?

s - block Elements (Alkali and Alkaline Earth Metals)

Fill in the blanks : On heating $$ Rb(ICl_2) $$ will decompose giving _____ and ______

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