Which statement is not true ?

• A

  pH of $1 \times {10}^{-8}$ M HCl is 8

• B

  96500 coulomb deposits 1 g equivalent of copper

• C

  Conjugate base of ${\mathrm{H}}_2{\mathrm{PO}}_4^{-} \mathrm{is} {\mathrm{HPO}}_4^{2-}$

• D

  pH + pOH = 14 for all aqueous solution