OnlineCBT
Chemistry · CHEMICAL BONDING AND MOLECULAR STRUCTURE
हिन्दीConsider the following molecules/ions: (A) \( \text{BF}_3 \) (B) \( \text{SF}_6 \) (C) \( \text{NO}_2 \) (D) \( \text{AlCl}_3 \) How many of the above species exhibit an incomplete octet (less than 8 electrons) around the central atom? Which of the above statements is/are correct?
Correct answer · Option 3
Only three
Explanation
BF3 (6 electrons), NO2 (7 electrons around N, odd-electron), and AlCl3 (6 electrons) all have less than 8 electrons around the central atom. SF6 has 12 electrons (expanded octet). Thus, exactly three species have less than 8 electrons.
