Solutions · JEE Main previous year questions

2012 1 question

1. Q732012 · 26 May 2012 · Shift 1

   The freezing point of a $1.00\mathrm{m}$ aqueous solution of $\mathrm{HF}$ is found to be $-1.91^{\circ }\mathrm{C}$. The freezing point constant of water, $K_f$ is $1.86\mathrm{K}\mathrm{kg}\mathrm{mo}{\mathrm{l}}^{-1}$. The percentage dissociation of $\mathrm{HF}$ at this concentration is

   1. A.$30\%$
   2. B.$10\%$
   3. C.$5.2\%$
   4. D.$2.7\%$
   Show answer

   Answer: D