JEE Main & Advanced Chemistry Structure of Atom Question Bank Critical Thinking

  • question_answer The Bohr orbit radius for the hydrogen atom \[(n=1)\] is approximately \[0.530{AA}\]. The radius for the first excited state \[(n=2)\] orbit is               [CBSE PMT 1998; BHU 1999]

    A) \[0.13{AA}\]    

    B) \[1.06{AA}\]

    C) \[4.77{AA}\]    

    D) \[2.12{AA}\]

    Correct Answer: D

    Solution :

    \[{{\text{I}}^{\text{st}}}\]excited state means \[n=2\]                                \[r={{r}_{0}}\times {{2}^{2}}\] \[=0.53\times 4\] \[=2.12\,\text{{ }\!\!\mathrm{AA}\!\!\text{ }}\]


You need to login to perform this action.
You will be redirected in 3 sec spinner