# Which statement is wrong about pH and $H^+$
( B ) pH of dilute and hot $H_2 SO_4$ is more than concentrate and cold $H_2SO_4$
( C ) Adding 1N soln of $CH_3COOH$ and $NaOH$ pH will be seven
( D ) Mixing solution of $CH_3COOH$ and HCl, pH will be less than 7