A graph of volume of hydrogen released vs time for the reaction between zinc and dil. HCl is given in Fig. 4.2. On the basis of this mark the correct option.

Question

Philoid · Accepted Answer

The graph is a straight line till V₃ or at t=40 we know the equation of a line.

y=mx + c, where m is the slope which can be determined by using the equation.

where (x₁,y₁),(x₂,y₂) are point on line,

For the above graph x₁=0,x₂=40,y₁=0 and y₂=V₃ .

Putting these values in the above equation we get slope V₃/40.

The average rate is equal to the slope of the graph hence V₃/40.

Thus option (iii) is correct.