Consider the graph given in figure . Which of the following options does not show instantaneous rate of reaction at 40 ?

Options

A. `(V_(5)-V_(2))/(50-30)`
B. `(V_(4)- V_(2))/(50-30)`
C. `(V_(3)- V_(2))/(40-30)`
D. `(V_(3)- V_(1))/(40-20)`

Answer

B

Explanation

Reaction occuring at smallest time interval is known as instantanueous rate of reaction e.g., instantaneous rate of reaction at 40 s is rate of reaction during a small interval of time close to 40 s. Volume change during a small time interval close of 40 s i.e.,
Instanteneous rate of reaction = `("Change in volume")/("Time interval close to 40 s")`
`(a) r_("inst")(20 s )=(V_(5)-V_(2))/(50-30)` correct
`(b) r_("inst")(20s)=(V_(4)-V_(3))/(50-30)"incorrect, correct is "(V_(5)-V_(3))/(50-30)`
(c) `r_("inst")(10s)=(V_(3)-V_(2))/(40-30)"correct"`
(d) `r_("inst")(20s)=(V_(3)-V_(1))/(40-20)"correct"`