Identify the incorrect statements

Options

A. An electronic wave function must be symmetrical with respect to the interchange of any two electrons.
B. `Phi^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.

Answer

A

Explanation

(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).