Q52 / 180 · AIIMS 2009 · Chemistry

$\mathrm{KF}$ combines with $\mathrm{HF}$ to form $\mathrm{KHF}_2$. This compound contains the species

  • A
    $\mathrm{K}^{+}, \mathrm{F}^{-}$and $\mathrm{H}^{+}$
  • B
    $\mathrm{K}^{+}, \mathrm{F}^{-}$and $\mathrm{HF}$
  • Correct answer
    C
    $\mathrm{K}^{+}$and $\left[\mathrm{HF}_2\right]^{-}$
  • D
    $[\mathrm{KHF}]^{+}$and $\mathrm{F}_2$

Solution

The fluoride ion, by a process of hydrogen bonding, forms the anion, $\mathrm{HF}_2^{-}$. The compound is written as $\mathrm{K}^{+}\left[\mathrm{HF}_2\right]^{-}$.

Hence, the correct answer is option: 'C'.

Relevant Questions