When considering collisions with i2 h2 found that the collision model (b) is likely to be reactive rather than (a) because the direction of the collision of two molecules, as appropriate.
When considering collision of H2 molecules with I2 collision found that (b) is likely to be more than a chemical reaction (A) because of the direction in the collision of two molecules.
When you consider the collision of molecules H I 2 to 2 found that the crash, (b) there is the chance that there will be more than a chemical reaction (A), as in the direction of the two molecules of the appropriate.