A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in Fig. below. On the basis of this, mark the correct option.

Options

A. Average rate uptto 40s is `(V_(3)-V_(2))/(40)`
B. Average rate upto 40 seconds is `(V_(3)-V_(2))/(40-30)`
C. Average rate upto 40 seconds is `(V_(3))/(40)`
D. Average rate up to 40 seconds is `(V_(3)-V_(1))/(40-20)`

Answer

C

Explanation

Average rate at 40s `=("Increase in volume")/("Time")=(V_(3))/(40).`