JEE PYQ: Chemical Kinetics Question 20
Question 20 - 2020 (06 Sep Shift 1)
Consider the following reactions: $\text{A} \to \text{P1}$; $\text{B} \to \text{P2}$; $\text{C} \to \text{P3}$; $\text{D} \to \text{P4}$.
The order of the above reactions are (i), (ii), (iii), and (iv), respectively. The following graph is obtained when log[rate] vs. log[conc.] are plotted:
[Graph shows four lines with different slopes: (iv) steepest, (ii) next, (i) next, (iii) least steep]
Among the following, the correct sequence for the order of the reactions is:
(1) (iv) > (i) > (ii) > (iii)
(2) (i) > (ii) > (iii) > (iv)
(3) (iii) > (i) > (ii) > (iv)
(4) (iv) > (ii) > (i) > (iii)
Show Answer
Answer: (4)
Solution
Rate $= k[A]^n$. $\log[\text{Rate}] = \log k + n\log[A]$. Slope $= n$ ($n$ is order of the reaction). The more the slope, the greater the order. Correct sequence: (iv) > (ii) > (i) > (iii).
BETA
