NEET Question Frequency Analysis

High-Yield NEET Traps

Trap 1 (Bond Order): Q: "Arrange $O_{2}$, $O_{2}^{+}$, $O_{2}^{-}$, $O_{2}^{2-}$ in decreasing bond order" A: $O_{2}^{+}$ (2.5) > $O_{2}$ (2) > $O_{2}^{-}$ (1.5) > $O_{2}^{2-}$ (1)

Trap 2 (Shape): Q: "Shape of $XeF_{2}$ is..." Trap: Students say "bent" because Xe has lone pairs. Correct: LINEAR (lone pairs equatorial in TBP)

Trap 3 (Dipole): Q: "Which has μ ≠ 0: $BF_{3}$ or $NF_{3}$?" Trap: Students say both have 3 F atoms so similar. Correct: $BF_{3}$ (trigonal planar) μ=0; $NF_{3}$ (trigonal pyramidal) μ≠0

Trap 4 (MO order): Q: "Is $O_{2}$ paramagnetic?" Trap: VBT says diamagnetic. MOT (correct) says paramagnetic.

Trap 5 (Lone pairs in TBP): Q: "Shape of $SF_{4}$?" Trap: Students say TBP (electron geometry). Correct: SEESAW (molecular shape; lone pair in equatorial of TBP)

Standard NEET Answer Framework for Bond Order Questions

1. Write total electron count for the species
2. Identify if Z ≤ 7 or Z > 7 (for homonuclear)
3. Fill MOs in correct order
4. Count Nb and Na
5. BO = (Nb − Na)/2
6. Check for unpaired electrons → paramagnetic or diamagnetic