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NEET Sample Paper NEET Sample Test Paper-91

  • question_answer
    The radius of the second Bohr orbit for hydrogen atom is: (Plank's const. \[h=6.6262\times {{10}^{-34}}Js;\] mass of electron \[=9.1091\times {{10}^{-31}}kg;\] charge of electron \[e=1.60210\times {{10}^{-19}}C;\] permittivity of vaccum \[{{\in }_{0}}=8.854185\times {{10}^{-12}}k{{g}^{-1}}{{m}^{-3}}{{A}^{2}}\])

    A) \[1.65\overset{{}^\circ }{\mathop{A}}\,\]          

    B)        \[4.76\overset{{}^\circ }{\mathop{A}}\,\]

    C) \[0.529\overset{{}^\circ }{\mathop{A}}\,\]        

    D)        \[2.12\overset{{}^\circ }{\mathop{A}}\,\]

    Correct Answer: D

    Solution :

    [d] Radius of \[{{n}^{th}}\] Bohr orbit in H-atom \[=0.53\,{{n}^{2}}\overset{{}^\circ }{\mathop{A}}\,\] Radius of II Bohr orbit \[=0.53\times {{(2)}^{2}}\] \[=2.12\overset{{}^\circ }{\mathop{A}}\,\]


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