CUET Preparation Today
Choose the correct statement for the collision theory of chemical reactions |
Proper orientation of the colliding particles makes them bounce back If the energy of the colliding particles is greater than the threshold energy, the collision is not effective Collison theory considers the atoms or the molecules as hard (solid and elastic) spheres Activation energy is the only criteria for determining an effective collision |
Collison theory considers the atoms or the molecules as hard (solid and elastic) spheres |
The correct answer is Option (3) → Collison theory considers the atoms or the molecules as hard (solid and elastic) spheres Collision theory explains how chemical reactions occur and why reaction rates differ. According to this theory, for a chemical reaction to take place, the reacting particles must collide with:
Only those collisions that satisfy these conditions are called effective collisions and lead to the formation of products. One of the assumptions of collision theory is that atoms or molecules behave like hard, elastic spheres that collide with each other. Option-wise Explanation Option 1: Proper orientation of the colliding particles makes them bounce back Proper orientation actually favours reaction because it allows correct interaction of reacting groups. When orientation is improper, particles bounce back without reaction. Therefore this statement is incorrect. Option 2: If the energy of the colliding particles is greater than the threshold energy, the collision is not effective If the energy of colliding particles is greater than or equal to activation energy, the collision can become effective (provided proper orientation exists). Therefore this statement is incorrect. Option 3: Collision theory considers the atoms or the molecules as hard (solid and elastic) spheres Collision theory models reacting particles as rigid elastic spheres that collide with each other. This assumption helps in explaining reaction rates and collision frequency. Therefore this statement is correct. Option 4: Activation energy is the only criteria for determining an effective collision Effective collisions require both sufficient energy and proper orientation. Since orientation is also required, activation energy alone is not sufficient. Therefore this statement is incorrect. |
