Q11 / 150 · MHT CET 2022 (07 Aug Shift 2) · Chemistry

A weak monoacidic base is $1.2 \%$ dissociated in its $0.2 \mathrm{M}$ solution. What is the value of dissociation constant?

  • A
    $1.21 \times 10^{-5}$
  • B
    $1.44 \times 10^{-5}$
  • C
    $2.54 \times 10^{-5}$
  • Correct answer
    D
    $2.88 \times 10^{-5}$

Solution

$\begin{aligned} & \mathrm{K}_{\mathrm{b}}=\propto^2 \mathrm{C} \\ & =(0.012)^2 \times 0.2 \\ & =2.88 \times 10^{-5}\end{aligned}$

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

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