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JEE Main & Advanced Chemistry Structure of Atom / परमाणु संरचना Question Bank Mock Test - Atomic Structure

  • question_answer
    The ratio of the radii of the three Bohr orbits is

    A) 1:1/2:1/3          

    B) 1:2:3

    C) 1:4:9                

    D) 1:8:27

    Correct Answer: C

    Solution :

    [c] \[r=\frac{{{n}^{2}}{{a}_{0}}}{Z},\](when n=1, Z=1)             \[{{r}_{1}}={{a}_{0}}\]             \[{{r}_{2}}=4{{a}_{0}}\](when n=2, Z=1)             \[{{r}_{3}}=9{{a}_{0}}\](when n=3, Z=1)             Hence, ratio is 1:4:9.


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