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Structure of Atom
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Structure of Atom
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25 Questions

1. A 066kg ball is moving with a speed of 100m/sThe associated wavelength will be ( h=6.6 ×10-34 Js) [2011]
2. An ion has 18 electrons in the outermostshell - it is [1990]
3. The position of both - an electron and ahelium atom is known within 1.0 nmFurtherthe momentum of the electron is known within5.0 × 10-“26 kg ms-“ 1The minimum uncertainty inthe measurement of the momentum of thehelium atom is [1998]
4. Which one of the following species does notexist under normal conditions? [2010]
5. The number of spherical nodes in 3p orbitalsare [1988]
6. Which of the following statements do notform a part of Bohr-™s model of hydrogen atom?[1989]
7. In a given atom no two electrons can have thesame values for all the four quantum numbers.This is called [1991]
8. The spectrum of He is expected to be similarto that [1988]
9. Which of the following is isoelectronic?[2002]
10. The maximum number of electrons in asubshell is given by the expression [1989]
11. The total number of atomic orbitals in fourthenergy level of an atom is: [2011]
12. In the photo-electron emission - the energyof the emitted electron is [1994]
13. If ionization potential for hydrogen atom is13.6 eV - then ionization potential for He + will be[1993]
14. In hydrogen atom - energy of first excitedstate is -“3.4 eV. Find out KEof the same orbit of Hydrogen atom [2002]
15. 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]
16. The ions O2-“ - F -“ - Na+ - Mg2+ and Al3+ areisoelectronicTheir ionic radii show [2003]
17. Which of the following has the minimumbond length? [2011]
18. The order of filling of electrons in theorbitals of an atom will be [1991]
19. Number of unpaired electrons in N 2+ is[1989]
20. The energy of second Bohr orbit of thehydrogen atom is 328 kJmol1 hence the energyof fourth Bohr orbit would be: [2005]
21. Maximum number of electrons in a subshellof an atom is determined by the following:[2009]
22. Which value is closest to the wavelength in nanometerof a quantum of light with frequency of 6 × 1015s-“1? [2013]
23. The pairs of species of oxygen and theirmagnetic behaviours are noted belowWhich ofthe following presents the correct description?[2012](a)17(b)n = 3 - l = 1 and m = -“1 [2013](c)
24. Set of isoelectronic species is [2000]
25. According to the Bohr Theory - which of thefollowing transitions in the hydrogen atom willgive rise to the least energetic photon? [2011 M]

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