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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 among the following elements have lowest value of \[I{{E}_{1}}\]   [CPMT 2004]

    A) Pb

    B) Sn

    C) Si

    D) C

    Correct Answer: B

    Solution :

    The ionisation energy of tin {Sn} is less than that of lead (Pb). It  is  due  to  the  poor  shielding  of  d- and f-electron in Pb due to which it feels greater attraction from nucleus.


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