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-p-Block elements - I — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
Which does not show inert pair effect ?
  • ✓
    $Al$
  • B
    $Bi$
  • C
    $Pb$
  • D
    $Tl$
✓

Answer

Correct option: A.
$Al$
a
Inert pair effect means that the $2 s$-electrons of the valence shell of heavier pblock elements form an inert pair and do not participate in bond formation. Inert pair effect occurs due to the poor shielding effect of $d$ and $f$ orbitals. Hence, due to small size and absence of $d$ and $f$ orbitals, Aluminium does not show inert pair effect.

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