Explain the following:(a) Lithium Iodide is more covalent than lithium

1.	Explain the following:(a) Lithium Iodide is more covalent than lithium fluoride. (b) Lattice enthalpy of LIF is maximuni among all the alkali metal halides.
Answer» (a) According to Fazan’s rule, Li⁺ ion can polarise I^- ion more than the F^- ion due to bigger size of the anion. Thus Li⁺ has more covalent character than LiF. (b) Smaller the size (internuclear distance), more is the value of lattice enthalpy since internuclear distance is expected to be least in the LiF.

Explain the following:(a) Lithium Iodide is more covalent than lithium fluoride. (b) Lattice enthalpy of LIF is maximuni among all the alkali metal halides.

Answer»

(a) According to Fazan’s rule, Li⁺ ion can polarise I^- ion more than the F^- ion due to bigger size of the anion. Thus Li⁺ has more covalent character than LiF.

(b) Smaller the size (internuclear distance), more is the value of lattice enthalpy since internuclear distance is expected to be least in the LiF.

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Explain the following:(a) Lithium Iodide is more covalent than lithium fluoride. (b) Lattice enthalpy of LIF is maximuni among all the alkali metal halides.

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