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4. Chemical bonding and molecular structure — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry4. Chemical bonding and molecular structure1 Mark
MCQ
Which of the following is not paramagnetic
  • A
    ${O_2}$
  • B
    $O_2^{1 + }$
  • ✓
    $O_2^{2 - }$
  • D
    $O_2^ - $
✓

Answer

Correct option: C.
$O_2^{2 - }$
(c) Species with unpaired electrons is paramagnetic ${O_2}$ has $2$ unpaired electrons,

$O_2^ - $ has one unpaired, $O_2^{2 - }$ has zero unpaired electrons, $O_2^{1+ }$ has one unpaired.

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