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Solution


Q.

Consider the equilibrium

CO(g)+3H2(g) ⇌ CH4(g)+H2O(g)

If the pressure applied over the system increases by two fold at constant temperature then

(A) Concentration of reactants and products increases.
(B) Equilibrium will shift in forward directions.
(C) Equilibrium constant increases since concentration of products increase.
(D) Equilibrium constant remains unchanged as concentration of reactants and products remain same.

Choose the correct answer from the options given below:                                           [2025]
1 (A) and (B) only  
2 (B) and (C) only  
3 (A), (B) and (C) only  
4 (A), (B) and (D) only  

Ans.

(1)

(A) Since pressure is increased, this means volume has been reduced. If volume is reduced, then concentration of each species (reactants as well as products) in the vessel increases.

(B) On increasing the pressure, system moves in a direction with less number of gaseous moles (Le Chatelier’s principle) which is forward direction in given case.

(C) (D) Equilibrium constant does not change upon changing concentration or pressure of reactants or products.