Question

The rate of certain hypothetical reaction A + B + C $\to$ Products, is given by $r=-\frac{dA}{dt}=k\left[A{]}^{1/2}\right[B{]}^{1/3}[C{]}^{1/4}$ The order of a reaction is given by:

• A. $1$
• B. $\frac{1}{2}$
• C. $2$
• D. $\frac{13}{12}$

Answer 1

The correct option is D $\frac{13}{12}$

$A+B+C$ $\to$ Products
$r=-\frac{dA}{dt}=k\left[A{]}^{1/2}\right[B{]}^{1/3}[C{]}^{1/4}$
so order is
$\frac{1}{2}+\frac{1}{3}+\frac{1}{4}=\frac{13}{12}$