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Which of the following statements is not correct?

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The orbital $3 d_{x^{2} - y^{2}}$ has no probability of finding electron along x- and y-axes

The energy of 3d orbital may be greater than or less than or equal to that of 4s orbital depending upon the atomic number of the atom

In a given electric field, $β$ -particles are deflected more than a-particles in spite of $α$ -particles having larger charge

Pauli exclusion principle is followed by fermiones

answer is A.

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Detailed Solution

Statement A is not correct, The orbital $3 d_{x^{2} - y^{2}}$ has no probability of finding electron along x- and y-axes.

The chance of finding an electron is never zero for the orbital ${dz}^{\land} 2$ since it lacks a nodal plane. For others, n -1 provides the nodal plane.

Hence, the option A is correct.

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