JEE Questions for Chemistry Structure Of Atom Quiz 11 - MCQExams.com

For the electronic transition from n = 2 to n = 1 which one of the following will produce shortest wave length?
  • H atom
  • D atom
  • He+ ion
  • Li2+ion
For a certain particle, it is found that uncertainty 1840 in velocity is reciprocal of uncertainty in position This implies that
  • Mass of the particle is > unity
  • Mass of the particle is unity
  • Mass of the particle ≤ h
  • Mass of the particle ≥ h / 4π
For particles having same KE., the de-broglie wavelength is
  • Directly proportional to its velocity,
  • Inversely proportional to its velocity
  • Independent of its mass and velocity
  • Unpredictable
Which of the expression given below gives IE of H atoms in terms of Rydberg’s constant (RH)?
  • RH.hc
  • RH.NA.hc
  • RH(2hc)
  • RH.c
If numerical value of mass and velocity are equal then de-Broglie wave length in terms of K.E. is

  • Chemistry-Structure of Atom-8006.png
  • 2)
    Chemistry-Structure of Atom-8007.png
  • both correct
  • none
If uncertainty in position and velocity are equal then uncertainty in momentum will be

  • Chemistry-Structure of Atom-8008.png
  • 2)
    Chemistry-Structure of Atom-8009.png

  • Chemistry-Structure of Atom-8010.png

  • Chemistry-Structure of Atom-8011.png
How fast an electron is moving if it has a wavelength equal to the distance it travel in one second?

  • Chemistry-Structure of Atom-8012.png
  • 2)
    Chemistry-Structure of Atom-8013.png

  • Chemistry-Structure of Atom-8014.png

  • Chemistry-Structure of Atom-8015.png
If uncertainties in the measurement of position and momentum are equal, the uncertainty in the measurement of velocity is

  • Chemistry-Structure of Atom-8016.png
  • 2)
    Chemistry-Structure of Atom-8017.png

  • Chemistry-Structure of Atom-8018.png
  • none of these
Energy equivalent of 10.00 cm–1 is

  • Chemistry-Structure of Atom-8019.png
  • 2)
    Chemistry-Structure of Atom-8020.png

  • Chemistry-Structure of Atom-8021.png
  • all are correct
The shortest wavelength of H-atom in Lyman series is x, then longest wavelength in Balmer series of He+ is

  • Chemistry-Structure of Atom-8022.png
  • 2)
    Chemistry-Structure of Atom-8023.png

  • Chemistry-Structure of Atom-8024.png

  • Chemistry-Structure of Atom-8025.png
The energy of hydrogen atom in its ground state is –13·6 eV. The energy of the level corresponding to the quantum number n = 5 is
  • “0·54 eV
  • “5·40 eV
  • “0·85 eV
  • “2·72 eV
The ground state configuration of Fe3+ ion in gaseous state is: (At. No. of Fe = 26}

  • Chemistry-Structure of Atom-8026.png
  • 2)
    Chemistry-Structure of Atom-8027.png

  • Chemistry-Structure of Atom-8028.png

  • Chemistry-Structure of Atom-8029.png
Which of the following expressions gives the de – Broglie relationship ?

  • Chemistry-Structure of Atom-8030.png
  • 2)
    Chemistry-Structure of Atom-8031.png

  • Chemistry-Structure of Atom-8032.png

  • Chemistry-Structure of Atom-8033.png

Chemistry-Structure of Atom-8034.png
  • 1·05 × 10–28 m
  • 1·05 × 10–26 m
  • 5·27 × 10–30 m
  • 5·25 ×10–28 m
If the radius of first Bohr orbit be a0, then the radius of third Bohr orbit would be
  • 3 × a0
  • 6 × a0
  • 9 × a0
  • 1/9 × a0
The de – Broglie wavelength associated with ball of mass 200 g and moving at a speed of 5 m hour–1 is of the order of (h = 6·625 x 10–34 Js)
  • 10–15 m
  • 10–20 m
  • 10–30 m
  • 10–25 m

Chemistry-Structure of Atom-8055.png

  • Chemistry-Structure of Atom-8056.png
  • zero

  • Chemistry-Structure of Atom-8057.png

  • Chemistry-Structure of Atom-8058.png

Chemistry-Structure of Atom-8059.png

  • Chemistry-Structure of Atom-8060.png
  • 2)
    Chemistry-Structure of Atom-8061.png

  • Chemistry-Structure of Atom-8062.png

  • Chemistry-Structure of Atom-8063.png
Among the following series of transition metal ions, the one where all metal ions have same 3d electronic configuration is

  • Chemistry-Structure of Atom-8064.png
  • 2)
    Chemistry-Structure of Atom-8065.png

  • Chemistry-Structure of Atom-8066.png

  • Chemistry-Structure of Atom-8067.png
For d-electron, the orbital angular momentum is

  • Chemistry-Structure of Atom-8068.png
  • 2)
    Chemistry-Structure of Atom-8069.png

  • Chemistry-Structure of Atom-8070.png

  • Chemistry-Structure of Atom-8071.png
Time taken for an electron to complete one revolution in the Bohr orbit of hydrogen atom is

  • Chemistry-Structure of Atom-8072.png
  • 2)
    Chemistry-Structure of Atom-8073.png

  • Chemistry-Structure of Atom-8074.png

  • Chemistry-Structure of Atom-8075.png
The energy of second Bohr orbit of the hydrogen atom is –328 kJ mol–1, hence the energy of fourth Bohr orbit would be
  • –41 kJ mol–1
  • –1312 kJ mol–1
  • –164 kJ mol–1
  • –82 kJ mol–1
The correct order of number of unpaired electrons in the ions Cu2+, Ni2+, Fe3+ and Cr3+ is

  • Chemistry-Structure of Atom-8076.png
  • 2)
    Chemistry-Structure of Atom-8077.png

  • Chemistry-Structure of Atom-8078.png

  • Chemistry-Structure of Atom-8079.png
Ground state electronic configuration of nitrogen atom can be represented by

  • Chemistry-Structure of Atom-8080.png
  • 2)
    Chemistry-Structure of Atom-8081.png

  • Chemistry-Structure of Atom-8082.png

  • Chemistry-Structure of Atom-8083.png
Which one of the following sets of quantum number represent an impossible arrangement ?

  • Chemistry-Structure of Atom-8084.png
  • 2)
    Chemistry-Structure of Atom-8085.png

  • Chemistry-Structure of Atom-8086.png

  • Chemistry-Structure of Atom-8087.png
The orbital diagram in which Aufbau principle is violated is

  • Chemistry-Structure of Atom-8088.png
  • 2)
    Chemistry-Structure of Atom-8089.png

  • Chemistry-Structure of Atom-8090.png

  • Chemistry-Structure of Atom-8091.png

Chemistry-Structure of Atom-8092.png

  • Chemistry-Structure of Atom-8093.png
  • 2)
    Chemistry-Structure of Atom-8094.png

  • Chemistry-Structure of Atom-8095.png

  • Chemistry-Structure of Atom-8096.png
The electrons, identified by quantum number n and (i) n = 4, l = 1 (ii) n = 4, l = 0 (iii) n = 3, l = 2 (iv) n = 3, l = 1 can be placed in order of increasing energy, from the lowest to highest, as
  • (iv) < (ii) < (iii) < (i)
  • (ii)< (iv) < (i) < (iii)
  • (i) < (iii) < (ii) < (iv)
  • (iii) < (i) < (iv) < (ii)
The wave length associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order
  • 10–10 m
  • 10–20 m
  • 10–30 m
  • 10–40 m
If the nitrogen atom had electronic configuration 1s7, it would have energy lower than that of the normal ground state configuration 1s2, 2s2, 2p3 because the electrons would be closer to the nucleus. Yet, 1s7 is not observed because it violates.
  • Heisenberg uncertainty principle
  • Hund’s rule
  • Pauli’s exclusion principle
  • Bohr postulates of stationary orbits
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