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Q.63. Consider the given graph showing variation of reactant concentration with time. Three different reactions were started with identical initial concentration of reactants. Which of the following statement is correct? [Figure: A graph showing reactant concentration [R] (mol L⁻¹) vs. time (t/s). There are three curves labeled 1, 2, and 3. Curve 1 is a straight line with a negative slope, indicating a constant rate. Curve 2 and 3 are non-linear, showing decreasing rates over time, with curve 3 decreasing faster than curve 2.]

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