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    4. Bohr's Model Of An Atom MCQ - Practice Questions with Answers

    Bohr's Model Of An Atom MCQ - Practice Questions with Answers

    Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET

    Quick Facts

    • Radius, velocity and the energy of nth Bohr orbital is considered one the most difficult concept.

    • 35 Questions around this concept.

    Solve by difficulty

    QuestionEASY

    Which of the following is not a correct value of angular momentum in any shell of an atom

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    Which of the following statements in relation to the hydrogen atom is correct?

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    Energy of an electron is given by   E=-2.178\times 10^{-18}J\left ( \frac{Z^{2}}{n^{2}} \right ),Wavelength of light required to excite an electron in a hydrogen atom from level n = 1 to n = 2 will be:

    (h=6.62\times10-34Js and c = 3.0 \times108 ms-1)

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    Calculate the energy in joule corresponding to light of wavelength 45 nm : (Planck's constant h = 6.63 x 10-34 Js;

    speed of light c = 3 x 108 ms -1)

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    According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?

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    The energies E1 and E2 of the two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e $\lambda_1$ and $\lambda_2$ will be:

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     If m and e are the mass and charge of the revolving electron in the orbit of radius r  for hydrogen atom, the total energy of the   
    revolving electron will be :                                                    

     

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    Root mean square velocity, average velocity, and most probable velocity of oxygen as is 1500m/s at the temperature of

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    Concepts Covered - 2

    Bohr’s Model for Hydrogen Atom

    Bohr's model :

    1. Force of attraction between the nucleus and an electron is equal to the centripetal force.

    2. mvr= nh/2\pi ,  n = principal quantum number.

    3. Energy can be absorbed or emitted when electron transfer orbit  E_{1}-E{_{2}}=h\nu

    Bohr’s Model for Hydrogen Atom/Hydrogen-like atoms :

    The frequency of radiation (ν) absorbed or emitted when electron jumps between two stationary states that differ in energy by ∆E, is given by:

    v= \Delta E/h= \left ( E_{2} -E_{1}\right )/h

    E2 is higher energy state and E1 is lower energy state

    Radius, velocity and the energy of nth Bohr orbital

     

    Bohr radius of nth orbit:

    r_{n}= 0.529 \frac{n^{2}}{z}A^{0}

    where Z is atomic number

    Velocity of electron in nth orbit:

    v_{n}= (2.165\times 10^{6})\frac{z}{n}\: m/s

    where z is atomic number

    Total energy of electron in nth orbit:

    E_{n}= -13.6\: \frac{z^{2}}{n^{2}}eV

    Where z is atomic number

    Study it with Videos

    Bohr’s Model for Hydrogen Atom
    Radius, velocity and the energy of nth Bohr orbital

    Study other Related Concepts

    Bohr's Model Of An Atom Current Topic

    Thomson atomic model
    Rutherford atomic model and its limitations
    Atomic Number(Z), Mass number(A), Isotopes and Isobars
    Electromagnetic radiation
    Planck's quantum theory
    Photoelectric effect
    Hydrogen Spectrum
    Bohr's Model Of An Atom
    Zeeman and Stark's effect.
    De Broglie Relationship

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    Reference Books

    Bohr’s Model for Hydrogen Atom

    Chemistry Part I Textbook for Class XI

    Page No. : 46

    Line : 15

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