A) An electronic wave function must be symmetrical with respect to the interchange of any two electrons
B) \[{{\psi }^{2}}\]must remain unchanged when the spin and space coordinates of the paired electrons are interchanged
C) For an n electron system the wave function \[\psi \] will be a function of 3 n spatial coordinate
D) Antisymmetrical wave function are found to represent the properties of electron.
Correct Answer: A
Solution :
[a] Pauli?s exclusion principle states that \[{{\Psi }^{2}}\]must remain unchanged by interchange of spin and space coordinate and that is possible only if \[\Psi \]changes its sign (antisymmetrical).
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