Gibbs Free Energy-Multiple Choice Questions Quiz

Interactive MCQs on “Gibbs Free Energy”:

Solve the following 10 questions: Only one option is correct. Click on the “Submit” button when done. Click on the “embed” button to use this quiz on your website. Click on “WhatsApp” to share this quiz.

Question 1: What does Gibbs free energy (G) indicate about a chemical reaction?

(a) The speed of the reaction
(b) The temperature of the reaction
(c) The direction of the reaction
(d) The color change during the reaction

Question 2: Which condition indicates a spontaneous process according to Gibbs free energy?

(a) ∆G > 0
(b) ∆G = 0
(c) ∆G < 0
(d) ∆G is undefined

Question 3: What does it mean when ∆G = 0 for a reaction?

(a) The reaction is impossible
(b) The reaction is at equilibrium
(c) The reaction has reached maximum energy
(d) The reaction proceeds very slowly

Question 4: Which of the following statements is true about exergonic reactions?

(a) They absorb energy from the surroundings.
(b) They have a positive ∆G value.
(c) They are not spontaneous.
(d) They release energy to the surroundings.

Question 5: What does a positive ∆G value indicate for a reaction?

(a) The reaction is at equilibrium.
(b) The reaction is spontaneous.
(c) The reaction requires an input of energy to proceed.
(d) The reaction releases energy.

Question 6: What is the relationship between ∆G and equilibrium constant (K) for a reaction?

(a) ∆G = K
(b) ∆G < K
(c) ∆G > K
(d) ∆G is not related to K

Question 7: At standard conditions (∆G°), a reaction will be spontaneous if:

(a) ∆G° = 0
(b) ∆G° < 0
(c) ∆G° > 0
(d) ∆G° is undefined

Question 8: Which equation represents the relationship between standard Gibbs free energy change (∆G°) and standard reaction enthalpy change (∆H°) at a given temperature (T)?

(a) ∆G° = -RTln(∆H°)
(b) ∆G° = ∆H° - T∆S°
(c) ∆G° = ∆H° - T∆S°
(d) ∆G° = ∆H° + T∆S°

Question 9: What does a negative ∆S value indicate for a reaction?

(a) An increase in randomness or disorder
(b) A decrease in randomness or disorder
(c) No change in entropy
(d) A balanced distribution of reactants and products

Question 10: When ∆G is negative and ∆H is positive for a reaction, what can be said about the reaction?

(a) The reaction is exothermic and spontaneous.
(b) The reaction is exothermic but not spontaneous.
(c) The reaction is endothermic and spontaneous.
(d) The reaction is endothermic but not spontaneous.