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Lithium reacts less vigorously with water than Sodium does. Which of the following property does not explain less vigorous reactivity nature of Lithium with water than Na ?

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Much lower solubility of LiOH than NaOh

Lower electropositivity of Li than Na

Most negative SRP value of Li than Na

Higher melting point of Li than Na

answer is A.

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Detailed Solution

Though SRP of Li is more negative than Na it reacts less vigorously with water because

(1) Li is electropositive than Na and tendency to loose electron is low

(2) Though reaction is exothermic and the heat released is not sufficient to melt Li to liquid state.

(3) Sparingly soluble LiOH forms a protective crust over the metal.

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