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The specific reaction rate (or rate constant) of a reaction depends upon (i) temperature of reaction (ii) concentration of reactants and products (iii) activation energy of reaction (iv) presence of absence of a catalystA. (i), (iii), (iv)B. (i), (ii), (iii), (iv)C. (i), (iii)D. (i), (ii) |
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Answer» Correct Answer - A A rate law is an equation that relates the rate of a reaction to the rate constant and the concentrations of reactants (and catalst) raised to various power. For a general reaction of the type `aA+bBrarrcC+dD` the rate law takes the form Rate `=k[A]^(x)[B]^(y)` Thus, rate law is the expression in which reaction rate is given in terms of molar concentration of reatants with each term raised to same power , which may or may not be same as the stoichiometric coefficient of the reacting species in a balance chemical equation If we know the values of `k,x`, and `y` , we can ues the rate law to calculate the rate of the reaction, given the concentrations of `A` and `B` . Like `k,x` and `y` must be determined exprimentally. In short, we can say that rate laws are always determined experimentallty. |
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