Chemistry · Factors affecting equilibrium: concentration, pressure, temperature, the effect of catalyst, Le Chatelier's principle
Select the correct statement at all conditions
Select the correct statement at all conditions
- A. Total number of moles in a closed system at new equilibrium is less than the old equilibrium if some amount bf a substance is removed from a system.
- B. In exothermic reaction, concentration of products dominate that of reactant
- C. Change in Entropy of a reversible reaction is zero
- D. \( A B \) and \( C \) are incorrect statements
Step-by-step solution
Option A is not always true because the change in total moles depends on reaction stoichiometry and which substance is removed. Option B is not always true; product concentrations depend on temperature and equilibrium constant. Option C is false because for a reversible reaction, entropy change of the system is not necessarily zero; only total entropy change (system+surroundings) is zero. Therefore, all A, B, and C are incorrect, making D correct.
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