Question

The value of $pK_w$ of water

• A. increases with increase in temperature
• B. decreases with rise in temperature
• C. does not change with variation in temperature
• D. increases till 50$^\circ$C and there after decreases

Answer 1

Answer: (B)

decreases with rise in temperature

Answer 2

With increase of temperature $K_{w}$ of water increases while $pK_{w}$ of water decreases