MHT CET · Chemistry · Chemical Kinetics

Which of the following is true for a reaction as per collision theory?

A Every collision between reactants leads to chemical reaction.
B It may be expected that rate of reaction is equal to rate of collision.
C For gas phase reactions, the number of collisions is far less compared to observed rate.
D The colliding molecules do not need proper orientation.

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Answer & Solution

Correct Answer

(B) It may be expected that rate of reaction is equal to rate of collision.

Step-by-step Solution

Detailed explanation

Not every collision between reactants leads to a chemical reaction.
For gas phase reactions, the number of collisions is more as compared to the observed rate.
The colliding molecules need proper orientation.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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