Chemistry WAEC

Consider the reaction A(s) + 2B(g) → 2C(aq) + D(g). What will be the effect of a decrease in pressure on the reaction?

A. the equilibrium will shift
B. rate of forward reaction will increase
C. rate of backward reaction will increase
D. rates of forward and backward reaction are not affected

Correct Answer: Option B

B. rate of forward reaction will increase

Explanation

Given: The equation below
A(s) + 2B(g) → 2C(aq) + D(g)

Since we have a higher number of moles of gaseous species on the LHS, i.e 2, a decrease in pressure will favor the forward reaction.

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