Which on these scenarios involve a reaction is at equilibrium. a. reaction is producing more products than reactances b. the reactions producing more reactants than products. c. the amount of products and reactants is changing. d the amount of products and reactants is constant

Explanation: D. the amount of products and reactants is constant

The reactions which do not go on completion and in which the reactant forms product and the products goes back to the reactants simultaneously are known as equilibrium reactions.

Equilibrium state is the state when reactants and products are present but the concentration of reactants and products does not change with time.

For a chemical equilibrium reaction, equilibrium state is achieved when the rate of forward reaction becomes equals to rate of the backward reaction.

Thus the amount of products and reactants is constant for a reaction at equilibrium.

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