TS EAMCET · Chemistry · Chemical Kinetics

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

A linear with +ve slope and non zero +ve intercept
B linear with -ve slope and non zero + ve intercept
C linear with -ve slope and zero intercept
D linear with +ve slope and zero intercept

Verified Solution

Answer & Solution

Correct Answer

(B) linear with -ve slope and non zero + ve intercept

Step-by-step Solution

Detailed explanation

Any reaction of zero order must obey the following equation \([A]=-k t+[A]_0 \text { or }[A]=[A]_0+k t\) 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…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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