Question

Which metallic hydroxide is pink in colour and is used as an antacid?

• A. $Ca(OH{)}_2$
• B. $Zn(OH{)}_2$
• C. $Mg(OH{)}_2$
• D. $Al(OH{)}_3$

Answer 1

The correct option is C

$Mg(OH{)}_2$

Magnesium hydroxide $Mg(OH{)}_2$ is used as antacid and laxative. The pH of this solution is around 10 and is better known as milk of magnesia.

Milk of Magnesia is a trade name for magnesium hydroxide, a medication used to treat constipation and to treat symptoms caused by too much stomach acid such as heartburn, upset stomach, or indigestion.