(i) Rate constant increases exponentially with increasing activation energy and decreasing temperature.
(ii) Rate constant decreases exponentially with increasing activation energy and decreasing temperature.
(iii) Rate constant increases exponentially with decreasing activation energy and decreasing temperature.
(iv) Rate constant increases exponentially with decreasing activation energy and increasing temperature
Correct Answer: (iv) Rate constant increases exponentially with decreasing activation energy and increasing temperature
Explanation: According to the Arrhenius equation, the rate constant increases exponentially with decreasing activation energy and increasing temperature.