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The s-Block Elements
How would you explain that BeO is insoluble but BeSO4 is soluble in water?
BeO is covalent in nature due to its smaller size, high ionisation enthalpy and high electronegativity and therefore it is insoluble in water. On the order hand, BeSO4 is ionic. Also because of small size of Be2+ ion, the hydration enthalpy of BeSO4 is much higher than its lattice enthalpy. Thus BeSO4 is highly soluble in water.
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Lithium has highest ionisation energy in group 1 elements, yet it is strongest reducing agent. Comment.
The softness of group 1 elements increases down the group with increasing atomic number. Give reason.
Which is the most reactive alkali metal and why?
Why alkali metals do not form M2+ ions?
Name the radio active element in group 1. How does it resemble with the remaining elements of the group?
Why alkali metals are normally kept in kerosene oil?
Why lithium cannot be stored in kerosene?
Why does lithium form complexes?
Why are alkali metal ions diamagnetic and colourless?
Why are alkali metals the most electropositive in nature?
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