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MCQ (Single Correct Answer)

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Which one of the following is the correct set of four quantum numbers (n, 1, m, s) ?
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In Bohr model of atom, radius of hydrogen atom in ground state is r1 and radius of He+ ion in ground state is r2. Which ...
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The de-Broglie wavelength ($$\lambda$$) for electron (e), proton (p) and He2+ ion ($$\alpha$$) are in the following orde...
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The number of unpaired electron in Mn2+ ion is
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The atomic masses of helium and neon are 4.0 and 20.0 amu respectively. The value of the de-Broglie wavelength of helium...
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The difference between orbital angular momentum of an electron in a 4f -orbital and another electron in a 4s-orbital is
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The number of unpaired electrons in the uranium (92U) atom is
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The radius of the first Bohr orbit of a hydrogen atom is 0.53 $$\times {10^-8}$$ cm. The velocity of the electron in the...
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The maximum number of electrons in an atom in which the last electron filled has the quantum numbers n = 3, l = 2 and m ...
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