Which of the following expression can be used to describe the instantaneous rate of the reaction ?
`2A+B rarr A_(2)B`

Options

A. `-1/2 (d[A])/(dt)`
B. `-(d[A])/(dt)`
C. `1/2(d[A_(2)B])/(dt)`
D. `-1/2 (d[A])/(dt). (d[B])/(dt)`

Answer

A

Explanation

The instantaneous rate of the reaction can be expressed by any of the following expressions
`-(1)/(2)(d[A])/(dt)or-(d[B])/(dt)or(d[A_(2)B])/(dt)`