MCAT General Chemistry Question 82: Answer and Explanation

Home > MCAT Test > MCAT general chemistry practice tests

Test Information

Use your browser's back button to return to your test results.
Do more MCAT general chemistry practice tests.

Question: 82

7. Given the reaction below:

FeI (aq) + I₂ (g) → FeI₃ (aq)

Which of the following would increase the formation of product?

A. Decreasing the volume of the container
B. Decreasing the pressure of the container
C. Increasing the volume of the container
D. Decreasing the volume of the container while maintaining a constant pressure

Correct Answer: A

Explanation:

Both increasing the pressure of the container and decreasing the volume would favor the side with fewer moles of gas, which is the product side. This makes choices (B) and (C) incorrect. Choice (D) would not disturb the equilibrium—the significance of decreasing the volume of the container in most equilibria is that there is an increase in pressure; in this case, however, the pressure remains constant despite the change in volume.

Previous Next