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The p-Block Elements — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistryThe p-Block Elements1 Mark
MCQ
Glass reacts with $HF$ forming :
  • A
    $\mathrm{F}_2$
  • ✓
    $\mathrm{H}_2 \mathrm{SiF}_6$
  • C
    $\mathrm{CaF}_2$
  • D
    $\ce{NaF}$
✓

Answer

Correct option: B.
$\mathrm{H}_2 \mathrm{SiF}_6$
$\mathrm{SiO}_2+6 \mathrm{HF} \rightarrow \mathrm{H}_2 \mathrm{SiF}_6+2 \mathrm{H}_2 \mathrm{O}$
When glass reacts with $HF, \mathrm{H}_2 \mathrm{SiF}_6$​ is formed.

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