for a reversible reaction if the concentrations of the

For a reversible reaction, if the concentrations of the reactants are doubled, the equilibrium constant will be

A. one-fourth

B. halved

C. doubled

D. the same

Answer : the same

Solution :
$$\eqalign{ & {\text{Consider a hypothetical change,}} \cr & A + B \rightleftharpoons C + D \cr & {\text{For this reaction,}} \cr & {K_{eq}} = \frac{{\left[ C \right]\left[ D \right]}}{{\left[ A \right]\left[ B \right]}} \cr} $$
For the above reaction if concentration of reactants are doubled then the rate of forward reaction increases for a short time but after sometime equilibrium will established. So, concentration has no effect on equilibrium constant. It remains unchanged after increasing the concentration of reactants.

Releted MCQ Question on
Physical Chemistry >> Chemical Equilibrium

Releted Question 1

For the reaction : $${H_2}\left( g \right) + {I_2}\left( g \right) \rightleftharpoons 2HI\left( g \right)$$ the equilibrium constant $${K_p}$$ changes with

A. total pressure

B. catalyst

C. the amounts of $${H_2}$$ and $${I_2}$$ present

D. temperature

View Answer

Releted Question 2

A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in the two phases have equal :

A. inter-molecular forces

B. potential energy

C. total energy

D. kinetic energy

View Answer

Releted Question 3

Pure ammonia is placed in a vessel at a temperature where its dissociation constant $$(a)$$ is appreciable. At equilibrium :

A. $${K_p}$$ does not change significantly with pressure.

B. does not change with pressure.

C. concentration of $$N{H_3}$$ does not change with pressure.

D. concentration of hydrogen is less than that of nitrogen.

View Answer

Releted Question 4

An example of a reversible reaction is :

A. $$Pb{\left( {N{O_3}} \right)_2}aq + 2NaI\left( {aq} \right) \to Pb{I_2}\left( s \right) + 2NaN{O_3}\left( {aq} \right)$$

B. $$AgN{O_3}\left( {aq} \right) + HCl\left( {aq} \right) \to AgCl\left( s \right) + NaN{O_3}\left( {aq} \right)$$

C. $$2Na\left( s \right) + {H_2}O\left( l \right) \to 2NaOH\left( {aq} \right) + {H_2}\left( g \right)$$

D. $$KN{O_3}\left( {aq} \right) + NaCl\left( {aq} \right) \to KCl\left( {aq} \right) + NaN{O_3}\left( {aq} \right)$$

View Answer

For a reversible reaction, if the concentrations of the reactants are doubled, the equilibrium constant will be

Releted MCQ Question on
Physical Chemistry >> Chemical Equilibrium

For the reaction : $${H_2}\left( g \right) + {I_2}\left( g \right) \rightleftharpoons 2HI\left( g \right)$$ the equilibrium constant $${K_p}$$ changes with

A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in the two phases have equal :

Pure ammonia is placed in a vessel at a temperature where its dissociation constant $$(a)$$ is appreciable. At equilibrium :

An example of a reversible reaction is :

Practice More Releted MCQ Question on
Chemical Equilibrium

Practice More MCQ Question on Chemistry Section

For a reversible reaction, if the concentrations of the reactants are doubled, the equilibrium constant will be

Releted MCQ Question on Physical Chemistry >> Chemical Equilibrium

For the reaction : $${H_2}\left( g \right) + {I_2}\left( g \right) \rightleftharpoons 2HI\left( g \right)$$ the equilibrium constant $${K_p}$$ changes with

A liquid is in equilibrium with its vapour at its boiling point. On the average, the molecules in the two phases have equal :

Pure ammonia is placed in a vessel at a temperature where its dissociation constant $$(a)$$ is appreciable. At equilibrium :

An example of a reversible reaction is :

Practice More Releted MCQ Question on Chemical Equilibrium

Practice More MCQ Question on Chemistry Section

Releted MCQ Question on
Physical Chemistry >> Chemical Equilibrium

Practice More Releted MCQ Question on
Chemical Equilibrium