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

Answer

C

Explanation

`Zn + dil . HCL to ZnCl_(2) + H_(2) uarr`
`"Average rate of reaction" =("change in concentration of"H_(2))/("Change in time ")=(V_(3) -0)/(10-0) =(V_(3))/(40)`