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

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
$AlF_3$ is soluble in $HF$ only in presence of $KF.$ It is due to the formation of
  • A
    $K_3[AlF_3H_3]$
  • ✓
    $K_3[AlF_6]$
  • C
    $AlH_3$
  • D
    $K[AlF_3H]$
✓

Answer

Correct option: B.
$K_3[AlF_6]$
b
$\mathrm{AIF}_{3}+\mathrm{KF} \stackrel{H F}{\longrightarrow} \mathrm{K}_{3}\left[\mathrm{AIF}_{6}\right]$

maximum $C.N.$ of $A l^{+3}$ is six so it forms $AlF_{6}^{3-}$

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