Average rate of reaction for the following reaction, `2SO_(2)(g)+O_(2)(g)rarr2SO_(3)(g)` is written as

Options

A. `(Delta[SO_2])/(Deltat)`
B. `-(Delta[O_2])/(Deltat)`
C. `1/2(Delta[SO_2])/(Deltat)`
D. `(Delta[SO_3])/(Deltat)`

Answer

B

Explanation

Average rate of reaction is defined as the speed with which the reactants are converted into products
For reaction, `2SO_2(g)+O_2to2SO_3(g)-1/2(Delta[SO_2])/(Deltat)=(-Delta[O_2])/(Deltat)=+1/2(Delta[SO_3])/(Deltat)`
So, average rate of reaction is written as `(-Delta[O_2])/(Deltat)` .