JEE Main & Advanced Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank Alkali Metals

  • question_answer
    As compared to potassium, sodium has [MP PMT 1985]

    A) Lower electronegativity

    B) Higher ionization potential

    C) Greater atomic radius

    D) Lower melting point

    Correct Answer: B

    Solution :

    Element          Na K   
    \[I{{E}_{1}}\] 496 419
    \[I{{E}_{2}}\] 4562 3051
    Sodium has higher I.E. because of smaller atomic size.

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