Question

Examine the graph and linear regression shown below and choose the answer that is FALSE. 1.2 1 y = -0.0034x +0.9996 R=1 0.8 306 0.4 0.2 0 0 50 100 200 250 150 time (s) The value of the rate constant for the reaction is 0.0034 The units of the rate constant are M/S The initial concentration of the reactant is 1 M The first half-life of the reaction is approximately 150 s The reaction has a half-life that does not depend on the initial concentration of the reactant

Answer 1

Answer

Fifth option. The reaction has half-life that does not depend upon the initial concentation of the reactant.

Explanation

The statement in the fifth option is false. Because, according to the graph, the reaction zero order and its half-life formula is $t_{1/2} = \frac{[A]_{0}}{2*k}$ , where, [A]₀ is the initial concentration of the reactant A.

All other options are wrong

First option. Wrong. Because, it is a true statement. The value of slope can be noted from the equation of straight line.

Second option. Wrong. Because, it is a true statement. The unit of k for zero order is M/s

Third option. Wrong. Because, it is a true statement. Initial concentration can be noted from the graph.

Fourth option. Wrong. Because, it is a true statement.

$t_{1/2} = \frac{[A]_{0}}{2*k}$

      = 1/2*0.0034

       = 1/0.0068

       = 147 sec (or)

150s