1. Addition of reactants to a chemical reaction in solution or gas phase at equi

Question

1. Addition of reactants to a chemical reaction in solution or gas phase at equilibrium results in ________
A.   a decrease in K and a shift in equilibrium to produce more products.
B.   an increase in K and a shift in equilibrium to produce more products.
C.   no change in K and a shift in equilibrium to produce more products.
D.   a decrease in K and a shift in equilibrium to produce more reactants.
E.   an increase in K and a shift in equilibrium to produce more reactants.

2. Which of the following is true regarding the effect of a catalyst on chemical equilibrium?
A.   Only the forward rate increases, but the quantity of products remains the same.
B.   Only the forward rate increases, so the quantity of products increases.
C.   Both the forward and reverse rates increase, but the quantity of products is unchanged.
D.   Both the forward and reverse rates increase, and the quantity of products increases.
E.   The effect varies depending on whether the reaction is endothermic or exothermic.

Thanks!

Explanation / Answer

W1. hen ever reactns are added there will not be any chnage in K. K is influenced only by temperature or pressure

C is the correct answer

2. C is the correct answer. The quantity of the product remain unchanged. The reaction in presence of catalyat proceeds in anlternative direction

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