Q13 / 160 · AP EAMCET 2022 (08 Jul Shift 1) · Chemistry

Statement $\mathbf{A}: \mathrm{pH}$ of buffer increases with increasing temperature. Statement B : The value of $K_W$ of water decreases with decreasing temperature.

  • A
    $\mathrm{A}$ is correct, but $\mathrm{B}$ is wrong.
  • Correct answer
    B
    Both $\mathrm{A}$ and $\mathrm{B}$ are correct
  • C
    Both $\mathrm{A}$ and $\mathrm{B}$ are wrong
  • D
    $\mathrm{A}$ is wrong but $\mathrm{B}$ is correct

Solution

Dissociation of electrolytes increases with increase in temperature: So, $\mathrm{K}_{\mathrm{w}}=\left[\mathrm{H}^{+}\right]\left[\mathrm{OH}^{-}\right]$also increases. $\therefore \quad$ pH of the buffer solution increases.

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

Relevant Questions