Question

Consider the following statements: I. Increase in concentration of reactant increases the rate of a zero order reaction. II. Rate constant \( k \) is equal to collision frequency if \( E_a = 0 \). III. Rate constant \( k \) is equal to collision frequency if \( E_a = \infty \). IV. \( \ln k \) vs \( T \) is a straight line. V. \( 1/T \) vs \( \ln k \) is a straight line. Correct statements are:

• A. I and IV
• B. II and V
• C. III and IV
• D. II and III

Hint:

The Arrhenius equation relates the rate constant and temperature, where the logarithm of the rate constant is a linear function of \( \frac{1}{T} \).

Answer 1

The Correct Option is B

Step 1: Analyzing the statements.
- Statement I is false because for zero-order reactions, the rate is independent of the concentration of the reactant. - Statement II is true because the rate constant is equal to collision frequency when \( E_a = 0 \). - Statement III is false because the rate constant is zero when \( E_a = \infty \). - Statement IV is true because \( \ln k \) vs \( T \) forms a straight line in the Arrhenius equation. - Statement V is true because \( 1/T \) vs \( \ln k \) is a straight line in the Arrhenius equation.

Step 2: Conclusion.
Thus, the correct statements are II and V.