Question
Match List I with List II List I Element List II Number of Neutron (A). ^ 24 _ 12 Mg (I). 5 (B). ^ 27 _ 13 Al (II). 12 (C). ^ 9 _ 4 Be (III). 6 (D). ^ 12 _ 6 C (IV). 14 Choose the correct answer from the options given below:
MHT CET
Chemistry
Structure of Atom
2026
MHT CET 2026 (11 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
- B. (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
- C. (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
- D. (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
Answer
B. (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
Step-by-step solution
The number of neutrons in an atom is calculated as the difference between its mass number (A) and atomic number (Z), i.e., n = A - Z. For ^ 24 _ 12 Mg, n = 24 - 12 = 12. This matches (II). For ^ 27 _ 13 Al, n = 27 - 13 = 14. This matches (IV). For ^ 9 _ 4 Be, n = 9 - 4 = 5. This matches (I). For ^ 12 _ 6 C, n = 12 - 6 = 6. This matches (III). The correct matching is (A) - (II), (B) - (IV), (C) - (I), (D) - (III). Answer: (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
Related: Chemistry — Structure of Atom · All PYQ Banks