Match List-I with List-II
| LIST-I Molecules of Halogens | LIST-II Colour |
| A. F2 | I. Yellow |
| B. Cl2 | II. Violet |
| C. Br2 | III. Greenish Yellow |
| D. I2 | IV. Red |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A)-(I), (B)-(III), (C)-(IV), (D)-(II)
All the halogens are coloured: their molecules absorb visible light, which excites outer electrons to higher energy levels. The energy absorbed decreases down the group, so the colour deepens from \( \ce{F2} \) to \( \ce{I2} \).
A. \( \ce{F2} \) — This matches I. Yellow.
B. \( \ce{Cl2} \) — This matches III. Greenish Yellow.
C. \( \ce{Br2} \) — This matches IV. Red.
D. \( \ce{I2} \) — This matches II. Violet.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.