MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

Gibbs free energy (G) and standard Gibbs free energy change ( G^ ) depend on the quantity of the substance, hence they are extensive properties. Standard cell potential (E^ _ cell ) is independent of the amount of substance, hence it is an intensive property. For a spontaneous reaction at constant temperature and pressure, the change in Gibbs free energy ( G) must be negative ( G The reversible electrical work done by a galvanic cell is equal to the decrease in its Gibbs free energy. Therefore, electrical work done by the system is equal to - G, not G. Thus, the statement "Electrical work is equal to G" is incorrect. Answer: Electrical work is equal to G