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Asked in PMC Practice Test 13 (2021) 2021Moderate

The slope of the curve obtained by plotting concentration change with time is actually?

Correct answer: C. Rate of reaction

  • A. Reaction time
  • B. Reaction Speed
  • C. Rate of reaction
  • D. All of these options are correct

Explanation

A. Reaction time (Incorrect): Reaction time refers to the time it takes for a reaction to occur, not the rate of the reaction represented by the slope of the concentration-time curve. B. Reaction Speed (Incorrect): Reaction speed is not a scientific term used to describe the slope of the concentration-time curve. It does not convey the concept of rate of reaction, which is represented by the slope. C. The rate of chemical reaction is the change in concentration of any of reactants or products per unit time. The gradient of the time is equal to the rate of reaction : the steeper the line , the greater the rate of reaction. D. This option can't be correct.

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About Rate of Reaction

Reaction rate measures the change in concentration of a reactant or product per unit time. Questions connect rate with concentration, temperature, pressure, surface area, catalysts and nature of reactants, and may involve rate laws, reaction order, activation energy and collision theory. Rate describes speed, whereas equilibrium describes the final balance of opposing reactions.

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