allerypH of the stomach (gastric juice) is approximately:
A1 - 2 (very acidic)
B4 - 5 (mildly acidic)
C7 (neutral)
D9 - 10 (basic)
Answer & Solution
Correct answer: A. 1 - 2 (very acidic)
1. Gastric juice contains hydrochloric acid → pH ≈ 1.5-2.
2. Strong acidity helps DIGESTION of food and kills swallowed bacteria.
3. Antacids (Mg(OH)₂ or NaHCO₃) neutralise excess acid in acidity / heartburn.
_Source: syllabus Science Ch 2 §2.3 pH and Body Functions_
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