Chemistry

Given below are two statement: one is labeled as Assertion (A) and the other is labeled as Reason (R)

Assertion (A) : The ionic radii of O²⁺ and Mg²⁺ are same

Reason (R) : Both O²⁺ and Mg²⁺ are isoelectronic species

In the light of the above statement, choose the correct answer from the options below.

Match the List-I with List-II

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R)

Assertion (A): At 10°C, the density of a 5M solution of KCl [atomic masses of K % Cl are 39 & 35.5 g mol^-1 respectively is 'x' g ml^-1. The solution is cooled to -21°C. The molality of the solution will remain unchanged.

Reason (R) : The molality of a solution does not change with temperature as mass remains unaffected with temperature

In the light of the above statements, choose the correct answer from the options given below.

A Chromatography column, packed with silica gel as stationary phase, was used to separate a mixture of compounds consisting of (a) benzanilide, (b) aniline and (c) acetophenone. When the column is eluted with a mixture of solvents, hexane; ethyl acetate $(20:80)$ , the sequence of obtained compounds is

Among the statements $(a-d)$ , the incorrect ones are:

Octahedral $\mathrm{C}\mathrm{o}$ (III) complexes with strong field ligands have very high magnetic moments

When ${\mathrm{\Delta }}_0<\mathrm{P}$ , the d-electron configuration of $\mathrm{C}\mathrm{o}$ (III) in an octahedral complex is ${\mathrm{t}}_{\mathrm{e}\mathrm{g}}^4{\mathrm{e}}_{\mathrm{g}}^2$
Wavelength of light absorbed by ${\left[\mathrm{C}\mathrm{o}(\mathrm{e}\mathrm{n}{)}_3\right]}^{3+}$ is lower than that of ${\left[{\mathrm{C}\mathrm{o}\mathrm{F}}_6\right]}^{3-}$

If the ${\mathrm{\Delta }}_0$ for an octahedral complex of $\mathrm{C}\mathrm{o}$ (III) is $\mathrm{18,000}{\mathrm{c}\mathrm{m}}^{-1}$ , the ${\mathrm{\Delta }}_{\mathrm{t}}$ for its tetrahedral complex with the same ligand will be $\mathrm{16,000}{\mathrm{c}\mathrm{m}}^{-1}$

For the following reactions:

${\mathrm{k}}_{\mathrm{s}}$ and ${\mathrm{k}}_{\mathrm{e}}$ are respectively, the rate constant for substitution and elimination, and $\mu =\frac{{\mathrm{k}}_{\mathrm{s}}}{{\mathrm{k}}_{\mathrm{e}}}$ , the correct option is

The bond order and the magnetic characteristics of ${\mathrm{C}\mathrm{N}}^{-}$ are