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The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state 1, would be (Rydberg constant =1.097×107 m-1)

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Important Questions on Structure of Atom

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Which of the following set of quantum numbers is correct for an electron in 4f orbital? 
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In the multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric field?

i) n=1, l=0, m=0
ii) n=2, l=0, m=0
iii) n=2, l=1, m=1
iv) n=3, l=2, m=1
v) n=3, l=2, m=0

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Which of the following statements in relation to the hydrogen atom is correct?
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Uncertainty in the position of an electron (mass =9.1×10-31 Kg) moving with a velocity 300 m.sec-1, accurate up to 0.001% will be: h=6.63×10-34 J-s
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According to Bohr's theory, the angular momentum of an electron in 5th orbit is
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The ionisation enthalpy of a hydrogen atom is 1.312×106J mol-1. The energy required to excite the electron in the atom from n1=1 to n2=2 is
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Which of the following sets of quantum numbers represents the highest energy of an atom?
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The energy required to break one mole of Cl-Cl bonds in Cl2, is 242kJmol-1. The longest wavelength of light capable of breaking a single Cl-Cl bond is
c=3×108ms-1and NA=6.02×1023mol-1