A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in figure . On the basis of this markt the correct options.

Options

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

Answer

C

Explanation

Average rate of reaction up to 40 seconds on the basis of the graph is:
`(V_(3)-0)/(40-0)=(V_(3))/(40)`