Q24 / 160 · TS EAMCET 2021 (06 Aug Shift 2) · Chemistry

$\mathrm{pH}$ of a $0.1 \mathrm{M}$ monobasic acid is 2 . Its osmotic pressure at a given temperature $T(\mathrm{~K})$ is (Given that the effective concentration for osmotic pressure is $(1+\alpha) \times$ concentration of acid $\alpha$ is the dissociation factor

  • A
    RT
  • Correct answer
    B
    0.11 RT
  • C
    0.01 RT
  • D
    0.001 RT

Solution

$\begin{aligned} \mathrm{pH} & =2 \\ C & =0.1=x \\ i & =1+x=1+0.1=1.1\end{aligned}$ Using formula, $$ \begin{aligned} \pi & =i C R T \\ & =1.1 \times 0.1 R T=0.11 R T \end{aligned} $$

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

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