Single Choice

Which of the following is most covalent ?

A$$CuCl$$
B$$NaCl$$
C$$AgCl$$
D$$AuCl$$
Correct Answer

Solution

The covalent character increases in the order $$NaCl < CuCl < AgCl < AuCl.$$.

The electronic configuration of $$Au^+$$ ion is $$ [Xe] 4f^{14} 5d^{10}$$. The 4f and 5d orbitals have a very poor shielding effect which results in a very high effective nuclear charge. $$ Au^+ $$ has very high $$ Z_{eff} $$ value in comparision to $$ Na^+, Cu^+$$ and $$Ag^+ $$.

Hence, $$AuCl$$ is most covalent.

SIMILAR QUESTIONS

Chemical Bonding

Polarisation is the distortion of the shape of anion by an adjacently placed cation. Which of the following statement is correct?

Chemical Bonding

Which of the following has been arranged in order of increasing covalent character?

Chemical Bonding

Polarising action of $$Cd^{2+}$$ an anions is stronger than that of $$Ca^{2+}$$ because:

Chemical Bonding

Which compound among the following has more covalent character ?

Chemical Bonding

Amongst $$LiCl$$, $$RbCl$$, $$BeCl_2$$ and $$MgCl_2$$, the compounds with the greatest and the least ionic character, respectively are:

Chemical Bonding

Among the following, the maximum covalent character is shown by which compound?

Chemical Bonding

Among the following which one has the highest cation to anion size ratio?

Chemical Bonding

Arrange the below molecules in order of increasing ionic character.$$LiF$$ $$, \ \displaystyle K_{2}O $$, $$ \displaystyle N_{2} $$, $$ \displaystyle SO_{2} $$ and $$ \displaystyle ClF_{3} $$

Chemical Bonding

The correct order of the increasing covalent character of the following is:

Chemical Bonding

The bond length in $$LiF$$ will be:

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