for the equilibrium mgc o 3 s and x21cc and x0394 mgo s c o

For the equilibrium,

M g C O_{3} (s) \overset{Δ}{⇌} M g O (s) + C O_{2} (g)

which of the following expressions is correct?

A. $${K_p} = {p_{C{O_2}}}$$

B. $${K_p} = \frac{{\left[ {MgO} \right]\left[ {C{O_2}} \right]}}{{\left[ {MgC{O_3}} \right]}}$$

C. $${K_p} = \frac{{{p_{MgO}}.{p_{C{O_2}}}}}{{{p_{MgC{O_3}}}}}$$

D. $${K_p} = \frac{{{p_{MgO}} + {p_{C{O_2}}}}}{{{p_{MgC{O_3}}}}}$$

Answer : $${K_p} = {p_{C{O_2}}}$$

Solution :
In heterogeneous system, $${K_C}$$ and $${K_p}$$ are not depend upon the concentration or pressure of solid substance. Hence, at equilibrium their concentration or pressure are assumed as one.
$$\eqalign{ & MgC{O_3}\left( s \right) \rightleftharpoons MgO\left( s \right) + C{O_2}\left( g \right) \cr & \therefore \,\,\,{K_p} = {p_{C{O_2}}} \cr} $$

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

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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 the equilibrium, $M g C O_{3} (s) \overset{Δ}{⇌} M g O (s) + C O_{2} (g)$ which of the following expressions is correct?

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 :

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Chemical Equilibrium

Practice More MCQ Question on Chemistry Section

For the equilibrium, MgC O 3 s ⇌ Δ MgO s +C O 2 g which of the following expressions is correct?

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 the equilibrium, $M g C O_{3} (s) \overset{Δ}{⇌} M g O (s) + C O_{2} (g)$ which of the following expressions is correct?

Releted MCQ Question on
Physical Chemistry >> Chemical Equilibrium

Practice More Releted MCQ Question on
Chemical Equilibrium