Question

_________ increases effective collisions without increasing average energy.

• A. An increase in the reactant concentration
• B. An increase in the temperature
• C. A decrease in pressure
• D. Catalysts
• E. $pH$

Answer 1

The correct option is A An increase in the reactant concentration

An increase in the reactant concentration increase effective collisions without increasing average energy.

This is due to the fact that molecules comes more and more closer, hence, they tends to collide more easily.