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FBISE Paper (2017) MCQs and Answers with explanation 1. For a general reaction, rate of forward reaction will be equal to a) K f [A][B] b) K f [2A][B] c) K f [A] 2 [B] d) K f [A] 2 + [B] ... Answer is c) Explanation: Rate of forward reaction is directly proportional to active masses of all reactant present in a balaced chemnical equation. In this reaction, rate of forward reaction will directly proportional to K f [A] 2 [B]. So correct option is c. show Answer 2. At equilibrium state of a reversible reaction a) concentration of reactant and product become equal b) forward and reverse reaction are stopped c) concentrations of reactants become zero d) concentrations of reactants and products become constant ... Answer is d) Explanation: At equilibrium, concentrations of reactants and product...