Question

According to the collision theory:

• A. collisions are sufficiently violent
• B. all collision are responsible for reaction
• C. all collisions are effective
• D. only sufficiently energetic molecules have enough energy to react

Answer 1

Answer: (D)

only sufficiently energetic molecules have enough energy to react

According to the collision theory, only those collisions are effective collisions that are energetic enough and cross over the threshold energy level.

The collision theory explains that gas-phase chemical reactions occur when molecules collide with sufficient kinetic energy. Thus, according to the collision theory, the rate at which a chemical reaction proceeds is equal to the frequency of effective collisions.

A collision will be effective in producing chemical change only if the species brought together possess a certain minimum value of internal energy, equal to the activation energy of the reaction and in the proper orientation.

Hence, the correct option is $\text{D.}$