Which one is not correct for a reversible reaction?

The reaction is never completed

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The reactants are present in the initial stage but after that the reactants and products are always present in the reaction mixture

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At equilibrium only products are present

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When the reaction is carried out in closed space, it attains equilibrium state after suitable time

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Solution

The correct option is C At equilibrium only products are present
The statement (C) not correct for a reversible reaction. At equilibrium both reactants and products are present. For example, consider the reversible reaction $A ⇌ B$ . Initially, only A is present. As the reaction progresses, B is also formed. At equilibrium, A and B both are present. A is never completely consumed as it is produced in the backward reaction.

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Similar questions

Q. I: After a system has reacted chemical equilibrium, there is no change in the concentrations of reactants and products.
II: Reactions are not reversible at equilibrium.

Q. If the initial concentrations in a particular mixture of reactants and products are

[P C l_{5}] = 0.5 M, [P C l_{3}] = 0.15 M

, and

[C l_{2}] = 0.6 M

, the direction in which the reaction proceed to reach equilibrium is:

Q. Initial number of moles of reactants taken in a closed reaction vessel are given. Percentage degree of dissociation is given. Identify the correct sequence of steps to calculate

K_{c}

value.
(a) Calculation of equilibrium concentrations of reactants and products.
(b) Calculation of equilibrium number of moles.
(c) Writing equilibrium constant expression for the reaction.
(d) Calculation of

K_{c}

value by using the equilibrium concentration.

In a reversible reaction the reaction in which the reactants change to the products is called the backward reaction and that in which the products change back to the reactants is called the forward reaction.

C O (g) + 2 H_{2} (g) \to C H_{3} O H (g)

K_{e q} = 14.5

The initial concentrations of this reaction are listed below.

[C H_{3} O H] = 2.5 M, [C O] = 1.3 M, [H_{2}] = 0.6 M

Based on these initial concentrations, which statement is true?

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