The interaction energy of London forces between two particles is proportional to rx, where r is the distance between…
Chemical Bonding · Class 11 · JEE Main Previous Year Question
The interaction energy of London forces between two particles is proportional to , where r is the distance between the particles. The value of x is:
- a
6
- b✓
-6
- c
3
- d
-3
-6
🧠 London (dispersion) forces arise from instantaneous dipole–induced dipole interactions. Their interaction energy has a specific distance dependence.
🗺️ London force interaction energy:
This can be written as where .
⚡ Distance dependence summary:
| Interaction | Energy ∝ | |------------|---------| | Ion–ion | | | Ion–dipole | | | Dipole–dipole (fixed) | | | London dispersion | |
The very steep dependence means London forces become negligible quickly as distance increases — they are significant only at very short (contact) distances.
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
A molecule with the formula AX4Y has all its elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y.…
Among SO2, NF3, NH3, XeF2, ClF3 and SF4, the hybridization of the molecule with non-zero dipole moment and highest number of lone pairs of electrons on the central atom is:
Which among the following molecules is (a) involved in sp3d hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?
Consider 'n' is the number of lone pair of electrons present in the equatorial position of the most stable structure of ClF3. The ions from the following with 'n' number of unpaired electrons are:…
The molecules having square pyramidal geometry are: