Present a comparative account of the alkali and alkaline earth metals with respect to the following characteristics:::

(i) Tendency to form ionic / covalent compounds

(ii) Nature of oxides and their solubility in water

(iii) Formation of oxosalts

(iv) Solubility of oxosalts

(v) Thermal stability of oxosalts

<p><span data-sheets-root="1">This is a long answer type question as classified in NCERT Exemplar</span></p><p><strong> (i) </strong>Alkaline earth metal compounds are less ionic than alkali metals because of small size and more effective nuclear charge.</p><p><strong> (ii)</strong> Oxides of alkali metals are more basic than alkaline earth metals. This are water soluble and highly exothermic. The hydroxides of alkaline earth metals are less basic than alkali metals.</p><p><strong> (iii) </strong>Alkaline earth metals give oxosalts. The reactivity of alkali metals is faster than the reactivity of alkaline earth metal. The reactivity of alkaline earth metal is less due to small size and more effective nuclear charge.</p><p><strong> (iv)</strong> The oxo salts of alkali metals are less soluble than the oxo salts of alkaline earth metal because of small size of cation and high hydration enthalpy.</p><p><strong> (v) </strong>The thermal stability of the oxo salts of alkali metals are more than the alkaline earth metals. The sodium carbonate is stable towards heat.</p>

0 Upvotes 0 Upvotes 0 Downvotes

• • Report Abuse
• Comment