JEE Main Chemistry question

Not in JEE Main or NEET syllabus

In certain matters, lithium differs from other alkali metals, the main reason for this is:

(A)Small size of lithium atom and ionCorrect
(B)Extremely high electropositivity of Li
(C)Greater hardness of Li
(D)Hydration of ion

Answer: (A)

Solution

Lithium's many anomalous properties (high polarising power, covalent character in its compounds, unique nitride formation, diagonal relationship with Mg, etc.) all trace back fundamentally to the unusually small size of the Li atom and ion. Lithium is actually the least (not "extremely

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Question ID VK-137838