Question

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 mark the correct option.

Options

• Average rate upto 40s is `(V_3 - V_2)/40`

• Average rate upto 40 seconds is `(V_3 - V_2)/(40 - 30)`

• Average rate upto 40 seconds is `V_3/40`

• Average rate upto 40 seconds is `(V_3 - V_1)/(40 - 20)`

Answer 1

Average rate upto 40 seconds is `V_3/40`

Explanation:

Average rate for the reaction = `("Change in concentration of"  H_2)/"Change in time"`

= `"Final concentration - Initial concenrtation"/"Final time - Initial time"`

Analyzing the graph line where time and vloume intersect.

= `(V_3 - 0)/(40 - 0)`

= `V_3/40`