MCQ
Which statement is not true, regarding $2\,s$ orbital.
- ANumber of radial nodes is greater than zero
- BAngular nodes is equal to zero
- C$\Psi \left( {\theta ,\phi } \right) = $ constant
- ✓Probability density is zero at nucleus
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| $I.P.$ | Reason |
| $(A)$ $N > O$ | Half filled configuration |
| $(B)$ $Zr < Hf$ | Lanthenide contraction |
| $(C)$ $Na > K$ | $Z_{eff}$ |
| $(D)$ $Al < Ga$ | Transition contraction |
Statement $(I)$ : A $\pi$ bonding $MO$has lower electron density above and below the inter-nuclear asix.
Statement $(II)$ : The $\pi^*$ antibonding $MO$ has a node between the nucles.In the light of the above statements, choose the most appropriate answer from the options given below:

