phosphorus pentachloride dissociates as follows in a closed

Phosphorus pentachloride dissociates as follows, in a closed reaction vessel $$PC{l_5}\left( g \right) \rightleftharpoons PC{l_3}\left( g \right) + C{l_2}\left( g \right)$$
If total pressure at equilibrium of the reaction mixture is $$P$$ and degree of dissociation of $$PC{l_5}$$ is $$x,$$ the partial pressure of $$PC{l_3}$$ will be

A. $$\left( {\frac{x}{{x - 1}}} \right)P$$

B. $$\left( {\frac{x}{{1 - x}}} \right)P$$

C. $$\left( {\frac{x}{{x + 1}}} \right)P$$

D. $$\left( {\frac{{2x}}{{1 - x}}} \right)P$$

Answer : $$\left( {\frac{x}{{x + 1}}} \right)P$$

Solution :
$$\mathop {PC{l_5}\left( g \right)}\limits_{1 - x} \rightleftharpoons \mathop {PC{l_3}\left( g \right)}\limits_x + \mathop {C{l_2}\left( g \right)}\limits_x $$
Total moles after dissociation $$1 - x + x + x = 1 + x$$
$${p_{PC{l_3}}} = $$ mole fraction of $$PC{l_3}$$ × Total pressure
$$\,\,\,\,\,\,\,\,\,\,\,\,{\text{ = }}\left( {\frac{x}{{1 + x}}} \right)P$$

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

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

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