The set of elements that differ in mutual relationship from those of the other sets is :
Question:

The set of elements that differ in mutual relationship from those of the other sets is :

  1. $\mathrm{L}_{\mathrm{i}}-\mathrm{Mg}$

  2. $\mathrm{B}-\mathrm{Si}$

  3. $\mathrm{Be}-\mathrm{Al}$

  4. $\mathrm{Li}-\mathrm{Na}$


Correct Option: , 4

Solution:

$\mathrm{Li}-\mathrm{Mg}, \mathrm{B}-\mathrm{Si}, \mathrm{Be}-\mathrm{A} 1$ show diagonal relationship but $\mathrm{Li}$ and $\mathrm{Na}$ do not show diagonal relationship as both belongs to same group and not placed diagonally.

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