For pure water

Options

A. `pK_(w)` increses with decreases in temperature
B. `[H_(2)O]` decreases with increase in temperature
C. `alpha_(H_(2)O)` increases with decrease in temperature
D. Both `pH` and `pOH` decrease with rise in temperature

Explanation

On heating pure water the value of ionic product of water increases I.e, `K_(w)=10^(-14)` at `25^(@)C` and at `100^(@)C K_(w)=10^(-12)` Thus `pH` and `pOH` both becomes `6` at `100^(@)C (pH` and `pOH=7` at `25^(@)C)`