Ion Polarisation

The most polarisable ion among the following is.

Choose the correct statement with reference to water and hydrogen peroxide. 

When a $300 \mathrm{m}\mathrm{m}$ long tube filled with $60 \mathrm{c}\mathrm{c}$ of sugar solution produces an optical rotation of $9^o,$ find the quantity of sugar in the solution ( $\alpha$ for sugar is $6^o{\mathrm{m}}^2/\mathrm{k}\mathrm{g}$ ).

Polarizing action of $\mathrm{C}{\mathrm{d}}^{2+}$ on anions is stronger than that of $\mathrm{C}{\mathrm{a}}^{2+}$ because

In the ionic bond, a cation tend to polarize the electron cloud of the anion by pulling electron density towards itself. This causes development of covalent character in ionic bond because the electron density gets localized in between the nuclei. The tendency of cation to bring about the polarization of anion is expressed as its polarizing power. The ability of ion to undergo polarization is called its polarizability. The polarizing power of cation and polarizability of anion are decided on the basis of Fajan rules as given below:

i) The smaller the cation, the higher is its polarizing power.

ii) Cations with pseudo noble gas configuration $\left(\mathrm{n}{\mathrm{s}}^2\mathrm{n}{\mathrm{p}}^6\mathrm{n}{\mathrm{d}}^{10}\right)$ having relatively high polarizing power than those with noble gas configuration $\left(\mathrm{n}{\mathrm{s}}^2\mathrm{n}{\mathrm{p}}^6\right)$ .

iii) The larger the size of the anion, the higher is its polarizability.





The ionic conductance of which of the following is the highest?

Which of the following is/are correct?

Which of the following is/are correct?

Which of the following has a high polarizing power?

The most favourable conditions for the formation of ionic bonds are:

The charge to size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, ${\mathrm{K}}^{+}, \mathrm{C}{\mathrm{a}}^{2+}, \mathrm{M}{\mathrm{g}}^{2+} \mathrm{and} \mathrm{B}{\mathrm{e}}^{2+}$?

The polarising ability of which one of the following is highest?

Polarising action of ${\mathrm{Cd}}^{2+}$ on anions is stronger than that of ${\mathrm{Ca}}^{2+}$ because

Which of the following ions has the maximum polarising power ?

The charge / size ratio of a cation determines its polarizing power . Which one of the following sequences represents the increasing order of the polarizing power of the cationic species .
K⁺ , Ca²⁺ , Mg²⁺ , Be²⁺  , ?