Question

# Which of the following is the correct statement?When two systems have the same temperature, the system are in thermal equilibrium When the concentrations of reactants and products in a reaction mixture remain unchanged with time, the system is in chemical equilibrium All of theseWhen two systems have the same pressure, the system are in mechanical equilibrium

Solution

## The correct option is C All of theseThermal equilibrium is achieved when the two systems have the same temperature. Mechanical equilibrium is achieved when the systems have the two systems have the same pressure. Similarly, when concentrations of reactants and products do not change with time, the reaction mixture is in chemical equilibrium.

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