JEE Main Chemistry question

Not in JEE Main or NEET syllabus

Sodium reacts with water more vigorously than lithium because it:

(A)Has higher atomic weight
(B)Is more electronegative
(C)Is more electropositiveCorrect
(D)Is a metal

Answer: (C)

Solution

Sodium has lower ionisation enthalpy and larger atomic size than lithium, making it more electropositive and therefore more reactive towards water. Higher atomic weight alone (A) does not directly explain the reactivity difference,

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Question ID VK-137820