Question

The time required to $100\%$ completion of zero order reaction is (a is initial concentration and K is rate constant)

• A. $\frac{2K}{a}$
• B. $\frac{a}{2K}$
• C. $\frac{a}{K}$
• D. $aK$

Answer 1

The correct option is C $\frac{a}{K}$

For zero order reaction

$Kt=\left[A_0\right]-\left[A\right]$

As reaction is completing 100 percent final concentration of reactants is zero.

$\therefore \left[A\right]=0$.

Given in question that initial concentration is $[A{]}_0=a$.

$\therefore Kt=a-0$

$t=\frac{a}{K}$