Arrange the following in increasing order of covalent character: (A) CaF2 (B) CaCl2 (C) CaBr2 (D) CaI2
Chemical Bonding · Class 11 · JEE Main Previous Year Question
Arrange the following in increasing order of covalent character:
(A) (B) (C) (D)
- a
B < A < C < D
- b✓
A < B < C < D
- c
A < B < D < C
- d
A < C < B < D
A < B < C < D
🧠 All four compounds share the same cation (Ca²⁺). Covalent character depends only on the polarisability of the anion.
🗺️ Polarisability order of halide ions:
Larger anion → more polarisable → more distorted by Ca²⁺ → more covalent character.
Increasing covalent character:
⚡ This is the standard anion size/polarisability argument. The cation is held constant, so it's a clean test of one Fajans' rule variable.
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Chemical Bonding) inside The Crucible, our adaptive practice platform.
More JEE Main Chemical Bonding PYQs
Which of the following is least ionic?
Arrange the bonds in order of increasing ionic character in the molecules: LiF, K2O, N2, SO2 and ClF3
When A and B are the wave functions of atomic orbitals, then is represented by:
Given below are two statements: Statement I: A π bonding MO has lower electron density above and below the inter-nuclear axis. Statement II: The π antibonding MO has a node between the nuclei. Choose…
The bond dissociation energy is highest for