Home / Person / John Dalton
Person John Dalton
Asked 4 times across 2 UPSC exams over 8 years (2015–2023), peaking in 2015.
Key insights
- Most tested in CDS — 3 of 4 PYQs
- Most asked in 2015
- Recurs across 2 years (2015–2023)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2015 → NDA 2023
How the concept evolved
Long-running — most appearances (3 of 4) predate 2016, and it still returns.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
NDA2023
As proposed by Dalton, which of the following symbol represents phosphorus ?
- A (a)
- B (b)
- C (c)
- D (d) ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CDS2015
Match List-I with List-II and select the correct answer using the code given below the Lists
| List I (Exponent) | List II (Law) |
|---|
| A. John Dalton | 1. Law of definite proportion by volume |
| B. Joseph Proust | 2. Law of multiple proportion |
| C. Antoine Lavoisier | 3. Law of definite proportion by weight |
| D. Joseph Louis Gay-Lussac | 4. Law of conservation of mass |
Codes:
- A A-2 B-3 C-4 D-1 ✓
- B A-2 B-4 C-3 D-1
- C A-1 B-3 C-4 D-2
- D A-1 B-4 C-3 D-2
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
CDS2015
The atomic theory of matter was first proposed by
- A John Dalton ✓
- B Rutherford
- C J. J. Thomson
- D Niels Bohr
✓ 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 →