Directions: Each of these questions contains an Assertion followed by reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.

Assertion: Beryllium resembles aluminium.

Reason: Charge/radius ratio of ${\mathrm{Be}}^{2+}$ ion is nearly the same as that of the ${\mathrm{Al}}^{3+}$ ion.

Given below are two statements:

Statement I : The chlorides of $\mathrm{Be}$ and $\mathrm{Al}$ have Cl-bridged structure. Both are soluble in organic solvents and act as Lewis bases.

Statement II: Hydroxides of $\mathrm{Be}$ and $\mathrm{Al}$ dissolve in excess alkali to give beryllate and aluminate ions. In the light of the above statements. Choose the correct answer from the options given below.

Among the statement (I – IV), the correct ones are:

(I) Be has smaller atomic radius compared to Mg.

(II) Be has higher ionization enthalpy than AI.

(III) Charge/radius ratio of Be is greater than that of Al.

(IV) Both Be and Al form mainly covalent compounds

Identify the ions which form hydrated chlorides from the following:

$\mathrm{a})$ ${\mathrm{Ba}}^{2+}$
$\mathrm{b})$ ${\mathrm{Li}}^{+}$
$\mathrm{c})$ ${\mathrm{Sr}}^{2+}$
$\mathrm{d})$ ${\mathrm{Cs}}^{+}$
$\mathrm{e})$ ${\mathrm{Mg}}^{2+}$
$\mathrm{f})$ ${\mathrm{Rb}}^{+}$
$\mathrm{g})$ ${\mathrm{Ca}}^{2+}$