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STD 12 - p -Block elements - ll — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - p -Block elements - ll4 Marks
MCQ
The laboratory test 'tailing the mercury' is applied to identify
  • A
    $O_2$
  • B
    $O_3$
  • C
    $H_2O$
  • ✓
    $H_2O_2$
✓

Answer

Correct option: D.
$H_2O_2$
d
$\mathrm{KO}_{2}$ is used in oxygen cylinders for space and submarines. Because it absorbs $\mathrm{CO}_{2}$ and release $\mathrm{O}_{2}$

$4 \mathrm{KO}_{2}+2 \mathrm{CO}_{2} \rightarrow 2 \mathrm{K}_{2} \mathrm{CO}_{3}+2 \mathrm{O}_{2}$

Hence A \& C are correct.

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