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NEET Sample Paper NEET Sample Test Paper-53

  • question_answer
    If for an element (P) the value of successive ionisation energies \[{{I}_{1}},\,\,{{I}_{2}},\,\,{{I}_{3}},\,\,{{I}_{4}}\,\,and\,\,{{I}_{5}}\] are 800, 2427, 3658, 25024 and 32824? kJ/mole  respectively, then the number of valence electron present are-

    A) 5         

    B)               4

    C) 3                                 

    D) 2

    Correct Answer: C

    Solution :

    Large jump between\[I{{E}_{3}}\And \text{ }I{{E}_{4}}.\text{ }So\text{ }I{{E}_{4}}\And \text{ }I{{E}_{5}}\], not possible, therefore 3 electron in valence shell.


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