The ${pK}_{W}^{0}$ of water

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increases with increase in temperature

remains constant with change in temperature

decreases with increase in temperature

increases upto 4°C followed by decrease

answer is B.

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Detailed Solution

${pK}_{W}^{\circ} = - \log K_{w}^{\circ}$ Hence, increase in $K_{w}^{\circ}$ (which occurs as temperature is increased) results into the decrease of ${pK}_{W}^{0}$

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