Structure of Atom
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Structure of Atom
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25 Questions

1. In a given atom no two electrons can have thesame values for all the four quantum numbers.This is called [1991]
2. The orientation of an atomic orbital isgoverned by [2006]
3. The orbitals are called degenerate when[1996]
4. If electron has spin quantum number + 2/1and a magnetic quantum number -1 - it cannot bepresent in [1994]
5. The ion that is isoelectronic with CO is[1997]
6. Which of the following statements do notform a part of Bohr-™s model of hydrogen atom?[1989]
7. If the energy of a photon is given as: = 3.03× 10-“19 J then - the wavelength of the photon is:[2000]
8. According to Bohr-™s theory the energyrequired for an electron in the Li 2+ ion to beemitted from n = 2 state is (given that theground state ionization energy of hydrogenatom is 13.6 eV) [1999]
9. When an electron of charge e and massm moves with a velocity v about the nuclearcharge Ze is circular orbit of radius r - thepotential energy of the electrons is given by[1994]
10. An ion has 18 electrons in the outermostshell - it is [1990]
11. In the photo-electron emission - the energyof the emitted electron is [1994]
12. The ions O2-“ - F -“ - Na+ - Mg2+ and Al3+ areisoelectronicTheir ionic radii show [2003]
13. Which of the following species has four lonepairs of electrons? [1993]
14. The number of spherical nodes in 3p orbitalsare [1988]
15. Which of the following is not permissiblearrangement of electrons in an atom? [2009]
16. The total number of atomic orbitals in fourthenergy level of an atom is: [2011]
17. Uncertainty in position of an electron (mass= 9.1 × 10-“28 g) moving with a velocity of 3 × 104cm/s accurate upto %0.001 will be (use h/4 Ï€)in uncertainty expression where h = 6.626 ×10-“27 erg-second) [1995]
18. The spectrum of He is expected to be similarto that [1988]
19. The value of Planck\'s constant is 6.63 × 10-34Js. The velocity of light is 3.0 × 108 m s- 1. Which value is closest to the wavelength in nanometers of a quantum of light with frequency of 8 × 1015s-1? [2003]
20. In hydrogen atom - energy of first excitedstate is -“3.4 eV. Find out KEof the same orbit of Hydrogen atom [2002]
21. A 066kg ball is moving with a speed of 100m/sThe associated wavelength will be ( h=6.6 ×10-34 Js) [2011]
22. The correct set of four quantum numbersfor the valence electron of rubidium atom (Z=)37 is [2012]
23. According to the Bohr Theory - which of thefollowing transitions in the hydrogen atom willgive rise to the least energetic photon? [2011 M]
24. Which of the following has the minimumbond length? [2011]
25. The total number of electrons that can beaccommodated in all the orbitals havingprincipal quantum number 2 and azimuthalquantum number 1 is [1990]

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