Molecularity of reaction depends on:
Pressure
Temperature
Both temperature and pressure
None of above
The number of reacting species (atoms, ions, or molecules) taking part in an elementary reaction that must collide simultaneously in order to bring about a chemical reaction is Molecularity.
The molecularity of a reaction is independent of pressure and temperature.
Therefore, option(4) is correct
Study 40% syllabus and score up to 100% marks in JEE