A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in the graph below.
                         
The correct statement among the following based on the graph given above is:

1. Average rate upto 40s is V3V2402.  Average rate upto 40s is V3V240303. Average rate upto 40s is V3404. Average rate upto 40s is V3V14020

HINT: Rate of reaction = Change in concentrationChange in time

Explanation: In the question, instead of a change in concentration, a change in volume is given. A change in volume can also explain the change in concentration.

The reaction is as follows:

Zn+ Dil. HClZnCl2+H2 Average rate ofreaction=Change in volume H2Change intime=V30400=V340