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

Reaction is `2SO_(2)(g) +O_(2)(g) to 2SO_(3)(g)`
Avg. rate of reaction = `-1/2 (Delta[SO_(2)])/(Deltat)`
`=1/2 (Delta[SO_(3)])/(Deltat)`
Out of four only 'b' option is correct.