Question

If $${K_1}$$  and $${K_2}$$  are respective equilibrium constants for the two reactions
$$Xe{F_6}\left( g \right) + {H_2}O\left( g \right) \rightleftharpoons $$     $$XeO{F_4}\left( g \right) + 2HF\left( g \right)$$
$$Xe{O_4}\left( g \right) + Xe{F_6}\left( g \right) \rightleftharpoons $$     $$XeO{F_4}\left( g \right) + Xe{O_3}{F_2}\left( g \right)$$
the equilibrium constant for the reaction
$$Xe{O_4}\left( g \right) + 2HF\left( g \right) \rightleftharpoons $$     $$Xe{O_3}{F_2}\left( g \right) + {H_2}O\left( g \right)$$     will be

A. $$\frac{{{K_1}}}{{K_2^2}}$$
B. $${K_1}.{K_2}$$
C. $$\frac{{{K_1}}}{{{K_2}}}$$
D. $$\frac{{{K_2}}}{{{K_1}}}$$  
Answer :   $$\frac{{{K_2}}}{{{K_1}}}$$
Solution :
$$K = {K_2} \times \frac{1}{{{K_1}}} = \frac{{{K_2}}}{{{K_1}}}.$$

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. $$KN{O_3}\left( {aq} \right) + NaCl\left( {aq} \right) \to KCl\left( {aq} \right) + NaN{O_3}\left( {aq} \right)$$
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Practice More Releted MCQ Question on
Chemical Equilibrium

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