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NDA 2 2025 GAT, question 103

Topic: Chemistry

Q103

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

List I (Element) List II (Atomicity)
A. Phosphorus 1. 2
B. Nitrogen 2. 1
C. Neon 3. 8
D. Sulphur 4. 4

Code :

A B C D

  1. (a) 4 1 2 3Correct answer
  2. (b) 4 2 1 3
  3. (c) 3 2 1 4
  4. (d) 3 1 2 4

Solution.

Answer: (a) 4 1 2 3

  1. The usual elemental forms are P₄, N₂, Ne and S₈.
  2. Their atomicities are respectively 4,2,1,8.
  3. Matching these to the numbered list gives A–4, B–1, C–2, D–3, code (a).