CDS 2026 (I) General Knowledge, question 21

Topic: Chemistry

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Q21

Match List-I with List-II and select the answer using the codes given below the Lists :

List-I (Symbol of Element) List-II (Group of Element)
A. Sm 1. Transition Elements
B. Cs 2. Alkali Metals
C. Os 3. Actinoid Elements
D. Np 4. Lanthanoid Elements
  1. (a) A-4, B-2, C-1, D-3Correct answer
  2. (b) A-4, B-1, C-2, D-3
  3. (c) A-3, B-1, C-2, D-4
  4. (d) A-3, B-2, C-1, D-4

Solution.

Answer: (a) A-4, B-2, C-1, D-3

  1. Sm is samarium, a lanthanoid (4); Cs is caesium, an alkali metal (2); Os is osmium, a transition element (1); and Np is neptunium, an actinoid (3).
  2. The code is A–4, B–2, C–1, D–3.