Distinguish between atomic orbital and molecular orbital.
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According to molecular orbital theory, which of the following will not be a viable molecule ?
H22- 4e– = σ 1s2, σ∗ 1s2 B.O. = (2-2)/2 = 0 ∴ It does not exist as B.O. is zero
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Why is s-orbital orbital considered non directional while p-orbital directional?
Electron density in s-orbital is equal in all direction while it dumble shaped along one axis in p- orbitals.
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Is the energy of an electron in 2s orbital same as of that in 2p orbital? Why?
No, the energy depends upon (n+l) values in an atom. Hence 2p orbital has greater energy than 2s.
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Give Reason. Overlapping of S orbital with any other orbital forms sigma bonds.
Because s orbital has same electron distribution in all axis/ directions.
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Distinguish between bonding molecular orbital and anti-bonding molecular orbital.
(i)The bonding molecular orbital has lower energy and hence greater stability than the corresponding antibonding molecular orbital. (ii) Just as the electron probability distribution around a nucleus in an atom is...
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Out of p-orbital and sp hybrid orbital which has greater directional character and why?
sp because lobes of p orbital have equal electron density whereas sp hybrid orbital has greater electron density on one side
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Explain the diamagnetic behaviour of Hydrogen molecule on the basis of molecular orbital theory.
It is formed by the combination of two hydrogen atoms. Each hydrogen atom has one electron in 1s orbital. Therefore, in all, there are two electrons in hydrogen molecule which...
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Show the non-existence of helium molecule based on molecular orbital theory.
Helium molecule (He2 ): The electronic configuration of helium atom is 1s2. Each helium atom contains 2 electrons, therefore, in He2 molecule there would be 4 electrons. These electrons will...
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Assertion :Both π2px and π*2px molecular orbital have one nodal; plane each
(d) If both assertion and reason are false.
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Out of the elements X and Y which has bigger atomic radius ? Give reason to justify your answer. (i) X has atomic number 18 and atomic mass 40.
Radius of Y is bigger than that of X. In 'X' the number of shells is three while in Y it is four.
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