Q56 / 200 · Manipal (MET) 2014 · Chemistry

Which pair is different from the others?

  • Correct answer
    A
    $\mathrm{Li}-\mathrm{Mg}$
  • B
    $\mathrm{B}-\mathrm{Al}$
  • C
    $\mathrm{Na}-\mathrm{K}$
  • D
    $\mathrm{Ca}-\mathrm{Mg}$

Solution

$\mathrm{Li}-\mathrm{Mg} \rightarrow$ diagonal relationship. $\mathrm{B}-\mathrm{Al}, \mathrm{Na}-\mathrm{K}$ and $\mathrm{Ca}-\mathrm{Mg} \rightarrow$ belongs to same group.

Hence, the correct answer is option: 'A'.

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