Home / Topic / Planetary atmosphere
Topic Planetary atmosphere
Asked 2 times across 2 UPSC exams over 18 years (2005–2023), peaking in 2005.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- Most asked in 2005
- Recurs across 2 years (2005–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 2005 → CDS 2023
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.
CDS2023
How much percentage of carbon dioxide is present in the atmosphere of Venus and Mars ?
- A 45 – 47%
- B 52 – 55%
- C 74 – 77%
- D 95 – 97% ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CSE2005
(,4): The existence of human life on Venus is highly improbable. Venus has an extremely high level of carbon dioxide in its atmosphere. (R):
- A Both A and R are true, and R is the correct explanation of A. ✓
- B Both A and R are true, but R is not a correct explanation of A
- C A is true but R is false
- D A is false but R is true
✓ Correct answer: (A)
Geography › Physical Geography of India
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 →