JEE Main & Advanced Chemistry Classification of Elements and Periodicity in Properties / तत्त्वों का वर्गीकरण एवं गुणों में आवर्ति Sample Paper Topic Test - Periodic Table

  • question_answer
    I.E. of one H atom is \[2.18\times {{10}^{-18}}J\]. The I.E. of H atom is \[kJ\,\,mol{{e}^{-1}}\]is -

    A) \[1505\,kJ\,mo{{l}^{-1}}\]

    B) \[1310\,kJ\,mo{{l}^{-1}}\]

    C) \[1608\,kJ\,mo{{l}^{-1}}\]

    D) None

    Correct Answer: B

    Solution :

    [b] \[\text{I}\text{.E}\text{.=}\frac{\text{2}\text{.18 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-18}}}\text{J}}{\text{1atom}}\text{ }\!\!\times\!\!\text{ }\frac{\text{6}\text{.02 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{23}}}\text{atom}}{\text{mole}}\]\[\text{=1}\text{.31 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{6}}}\text{J mol}{{\text{e}}^{-1}}\text{=1310 KJ mol}{{\text{e}}^{\text{-1}}}\]


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