CTET PAPER II 2019 · PYQ · Acids and Bases / Digestion · easy
'X' is a chemical present in our stomach and is necessary for digestion of food. When 'X' is secreted in excess, it causes health problems like indigestion. 'Y' is a chemical used to treat this condition. What could be 'X' and 'Y'?
A.X is hydrochloric acid & Y is sodium carbonate.
B.X is milk of magnesia & Y is hydrochloric acid.
C.X is hydrochloric acid & Y is milk of magnesia.✓ Correct
D.X is milk of magnesia & Y is ascorbic acid.
Explanation
Hydrochloric acid (HCl) is secreted in the stomach and is essential for digestion. Excess HCl causes acidity and indigestion. Milk of magnesia (magnesium hydroxide, Mg(OH)₂) is a mild base used as an antacid to neutralize excess stomach acid. Sodium carbonate is too strong a base for medical use, and ascorbic acid (vitamin C) is an acid, not a treatment for excess acid.
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