Question

The given figure depicts the change in concentration of species X and Y as a function of time. The point of intersection of the two curves represents:

• A. $t_{1/2}$
• B. $t_{3/4}$
• C. $t_{2/3}$
• D. data insufficient to predict

Answer 1

The correct option is A $t_{1/2}$

$X$ is reactant and $Y$ is product. The point where these two graphs intersect implies concentration of $X$ and $Y$ is same and it is only possible when

$\left[X\right]=50$% of initial concentration and

$\left[Y\right]=50$% of initial concentration.

At that time, $t=t_{1/2}$