(B) For the reaction $N_2 + O_2 \rightleftharpoons 2NO$,chemical equilibrium is defined as the state where the rate of the forward reaction equals the

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Concentration of all substances is constant

(B) For the reaction $N_2 + O_2 \rightleftharpoons 2NO$,chemical equilibrium is defined as the state where the rate of the forward reaction equals the rate of the backward reaction.At this state,the concentrations of all reactants $(N_2, O_2)$ and products $(NO)$ remain constant over time.Therefore,the correct statement is that the concentration of all substances is constant.

Class 11 Chemistry 6-1.Equilibrium (Chemical Equilibrium)Equilibrium state and Characteristics of K

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In the given reaction $N_2 + O_2 \rightleftharpoons 2NO$,equilibrium means that

A
Concentration of reactants is changing whereas concentration of products is constant
B
Concentration of all substances is constant
C
Concentration of reactants is constant whereas concentration of products is changing
D
Concentration of all substances is changing