Question

An experiment is run where the collisions of two reactants are studied. In the first trial of the experiment, nothing happened. In the second trial, a reaction occurred.
Which of the following statements could not explain why this occurred?

• A. The temperature was raised from trial $1$ to trial $2$.
• B. A catalyst was used in trial $2$ that was not used in trial $1$.
• C. The molecules collided with the correct orientation in trial $2$ but they did not do so in trial $1$.
• D. The second trial was started with some products present.

Answer 1

Answer: (D)

The second trial was started with some products present.

According to collision theory, the molecules which collide with correct orientation only form product. The reactants can also be converted to product by increasing the form product. Also, a catalyst helps to initiate reaction.