19. Which one of the following is false about Calcium hydroxide? a. Ca(OH)_(2) is a slow-acting antiseptic. b. 24-hour contact period is required for complete killing of enterococci. c. Ca(OH)_(2) has a low pH d. Ca(OH)_(2) has a limited solubility e. Ca(OH)_(2) has a broad-spectrum antimicrobial agent.

The false statement about Calcium hydroxide is:<br /><br />c. $Ca(OH)_{2}$ has a low pH.<br /><br />Calcium hydroxide, also known as slaked lime, is a strong alkali with a high pH. It is typically used as an antiseptic and has a broad-spectrum antimicrobial effect. It is also known for its limited solubility in water.