Question

The rate constant of a chemical reaction depends upon which of the following?

• A. Temperature
• B. Mass
• C. Weight
• D. Time

Hint:

A rise of about \(10^\circ\)C often doubles the rate of many reactions due to the exponential \(k(T)\) dependence.

Answer 1

The Correct Option is A

Step 1: Arrhenius dependence.
The rate constant \(k\) varies with temperature as \(k = A e^{-E_a/RT}\). Hence \(k\) primarily depends on temperature.
Step 2: Eliminate others.
Mass, weight, and time do not directly determine the value of \(k\) (for a given reaction and medium).
Step 3: Conclusion.
Therefore, the correct answer is (A) Temperature.