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For a zero order reaction, the plot of concentration of reactant v s time is (Hint: Consider the intercept on the concentration axis)

Options

  1. Alinear with +ve slope and non zero +ve intercept
  2. Blinear with -ve slope and non zero + ve intercept
  3. Clinear with -ve slope and zero intercept
  4. Dlinear with +ve slope and zero intercept

Correct answer

B. linear with -ve slope and non zero + ve intercept

Step-by-step solution

Any reaction of zero order must obey the following equation [A]=-k t+[A]₀ or [A]=[A]₀+k t This shows that, the concentration of reactant decreases linearly with time, as it is an equation of a straight line (y=m x+c) , the plot of [A] versus t will be straight line with slope =-k and intercept on the concentration axis =[A]₀ as shown in figure. Plot of [A] versus t for a reaction of zero order.

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