Which of the following compounds are administered as antacids :
(a) Sodium carbonate
(b) Sodium hydrogen carbonate
(c ) Aluminium carbonate
(d) Magnesium hydroxide

Options

A. Sodium carbonate
B. Sodium hydrogencarbonate
C. Aluminium carbonate
D. Magnesium hydroxide

Answer

B, D

Explanation

Antacid is a subtance which neutralizes excess of acid in stomach.
The chemical formula of sodium hydrogen carbonate is `NaHCO_(3)` it is often used as an antacid because it neutralises excess of HCl secreated from the walls of stmach.
`NaHCO_(3)(s) + HCl(aq) rarr NaCl(aq) + H_(2)O(l) + CO_(2)`
However, excessive hydrogen carbonate can make the stomach alkaline and trigger the production of even more acid.
Milk of magnesia, which is an aqueous solution of magnesium hydroxide is also used as an antacid.