Question

Consider a first order decomposition process

A₃¾® $\frac{3}{2}$ A₂

A plot of concentration of A₃ and A₂ versus time is shown below. At time t_A percentage of reactant de composed is

• A. 75%
• B. 50%
• C. 40%
• D. 30%

Answer 1

Answer: (C)

40%

Answer 2

A₃ ¾® $\frac{3}{2}$ A₂

A – x $\frac{3}{2}$ x

A – x = $\frac{3}{2}$ x or x = $\frac{2}{5}$ A

= 40 % of A