Home / Exams / GEO / GEO_2025 / Question
GEO · 2025 Science & Technology › Physics & Chemistry
Match List-I with List-II and select the correct answer using the code given below the Lists : List-I (Compound) A. H₂O B. Na₂O C. Al₂O₃ D. CO₂ List-II (Type of oxide) 1. Amphoteric 2. Acidic 3. Neutral 4. Basic Code :
🔎 The pattern behind this question
This is the same idea UPSC keeps returning to. Start a free trial to see the answer and the full map.
Across examsCDS 1 · GEO 1
Evolution“Oxides” tested across 2 years (2022–2025)
Related ideasAcids and bases

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 →
💬 Feedback

Send feedback