Home / Topic / Acid-base neutralization
Topic Acid-base neutralization
Asked 2 times across 2 UPSC exams over 8 years (2014–2022), peaking in 2014.
Key insights
- Most tested in CDS — 1 of 2 PYQs
- Most asked in 2014
- Recurs across 2 years (2014–2022)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2014 → CISF 2022
How the concept evolved
Long-running — most appearances (1 of 2) predate 2016, and it still returns.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CISF2022
Which one of the following compounds is present in antacid tablets or medicines which are used to cure indigestion and acidity in the stomach ?
- A Sodium hydroxide
- B Potassium hydroxide
- C Lithium hydroxide
- D Aluminium hydroxide ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CDS2014
Statement IDuring indigestion, Milk of Magnesia is taken to get rid of pain in the stomach
Statement IIMilk of Magnesia is a base and it neutralizes the excess acid in the stomach
- A Both the statements are individually true and Statement II is the correct explanation of Statement I ✓
- B Both the statements are individually true but Statement II is not the correct explanation of Statement I
- C Statement I is true but Statement II is false
- D Statement I is false but Statement II is true
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
Study how UPSC repeats — not just the papers
₹199 / 1 year · Founding Member
Full access unlocks the three things no PYQ PDF gives you:
① Cross-exam learning — see the same idea recur across CSE, CAPF, CDS and NDA.
② Topic evolution — how each idea is framed, year by year.
③ Question intelligence — every PYQ + answer, linked to related concepts and similar questions.
e.g. Round Table Conference: CDS 2017 → CSE 2017 → … → CAPF 2024
15 days free, no card required — then ₹199 for 1 year.
Start your 15-day free trial →