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(a). Mention the most abundant and least abudant alkaline earth metal in the earth's crust. (b).Mention at least five important properties of alkaline earth metals which increase from Be to Ba. c. Arrange alkaline earth metals in order of decreasing hydration enthalpy. d. Ca, Sr and Ba generally form ionic compounds. why? e. Mention colours of Ca,Ba and Sr in flame test.

Answer» <html><body><p></p>Solution :(a). Amongst the alkaline earth metals, the most abundant is calcium and the least abundant is radium in the earth's crust. <br/> (b). Five <a href="https://interviewquestions.tuteehub.com/tag/imortant-2125601" style="font-weight:bold;" target="_blank" title="Click to know more about IMORTANT">IMORTANT</a> <a href="https://interviewquestions.tuteehub.com/tag/properties-11511" style="font-weight:bold;" target="_blank" title="Click to know more about PROPERTIES">PROPERTIES</a> of alkaline earth metals which increas from `Be` to `Ba` are: <br/> i. size, <br/>ii. Metallic property, <br/> iii. reducing nature, <br/> vi. tendency to form peroxide, <br/> v. reactiveity <br/> <a href="https://interviewquestions.tuteehub.com/tag/c-7168" style="font-weight:bold;" target="_blank" title="Click to know more about C">C</a>. Hydration enthalpy: `Be^(2+)gtMg^(2+)gtCa^(2+) <a href="https://interviewquestions.tuteehub.com/tag/gt-1013864" style="font-weight:bold;" target="_blank" title="Click to know more about GT">GT</a> <a href="https://interviewquestions.tuteehub.com/tag/sr-650879" style="font-weight:bold;" target="_blank" title="Click to know more about SR">SR</a>^(2+)gtBa^(2+)`<br/> d. `Ca,Sr` and `Ba` generally form ionic compounds due to their low ionisation enthalpy. e. `{:("Elements",Ca,Sr,Ba),(Flame,Brick,Crimson,"Apple"),(colour,red,red,green):}`</body></html>


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