The term -dc dt in a rate equation refers to [Manipal 2003]

JEE Main Chemistry question

The term in a rate equation refers to [Manipal 2003]

(A)The decrease in concentration of the reactant with timeCorrect
(B)The concentration of the reactant
(C)The change in concentration of the reactant
(D)The velocity constant of the reaction

Answer: (A)

Solution

In a reaction, the concentration of a reactant always decreases with time, so its rate of change, , is negative; writing it as makes the expression a positive quantity representing the decrease in concentration of the reactant

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Question ID VK-144199