JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Question Bank Ionisation Energy

  • question_answer
    Which of the following has least ionization potential [CPMT 1982, 93]

    A) Li

    B) Cs

    C) Cl

    D) I

    Correct Answer: B

    Solution :

    \[Li\] and \[{{A}_{2}}{{B}_{3}}\] belong to Ist group but \[Cs\] has larger size, hence low nuclear attraction force, thus low ionization energy.


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