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p -Block elements - ll — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryp -Block elements - ll1 Mark
MCQ
There is no $S-S$ bond in
  • A
    $S_2O_4^{2-}$
  • ✓
    $S_2O_5^{2-}$
  • C
    $S_2O_3^{2-}$
  • D
    $S_2O_7^{2-}$
✓

Answer

Correct option: B.
$S_2O_5^{2-}$
b
$KOH\, + \,{O_3}\, \to \underbrace {\mathop {K{O_3}}\limits_{(a)} \, + \mathop {{O_2}\,}\limits_{(b)} }_{Paramagnetic} + {H_2}O$

$K{O_3}\, + HCl\, \to \,{O_2}\, + KCl\, + \,{H_2}O$

$O_2$ is best absorbed by alkaline pyrogallol.

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