Question

Which of the following is called milk of magnesia?
A.Suspension of $Mg{(OH)_2}$
B.Solution of $MgS{O_4}$
C.Suspension of $Mg$
D.Solution of $Mg{(HC{O_3})_2}$

Answer 1

Hint:Milk of magnesia is essentially the suspension of magnesium in water and due to milk like suspension, it is known as milk of magnesia. Suspension is that state of solution in which the particle size is greater than 1000nm and they are visible from naked eyes.

Complete step by step answer:

Milk of magnesia is a milky-white liquid that is essentially magnesium hydroxide suspended in water and it also contains sodium hypochlorite. It is typically used as a laxative and also as an antacid. It is basic in nature and hence it neutralises the acid present in the stomach which proves its utility as an antacid. The chemical reaction showing neutralization of stomach acid primarily \[HCl\] is given below:
$2HCl + Mg{(OH)_2} \to MgC{l_2} + 2{H_2}O$
The generic name for the milk of magnesia is Magnesium Hydroxide $Mg{(OH)_2}$and its solid form is known as Brucite.
Hence the correct answer is option A.

Additional Information:
Milk of magnesia can interact with other medicines and reduce their effects or can also react that may be harmful and hence, we should talk to a doctor before taking this for treating the underlying conditions.

Note:
Magnesium is essential for the body and helps functioning of muscles and nerves properly and milk of magnesia is used for relief from constipation, heartburn or indigestion. The magnesium present in magnesium hydroxide draws water from other tissues and helps in bowel movements. The milk of magnesia being a good laxative should not be taken more than prescribed as there are certain side effects also associated such as diarrhoea or vomiting. Also it does not cure the root cause and instead just provides relief from symptoms