For the reaction `(1)/(2)Ararr2B` , what is the relation between the rate of appearance of B and the rate of disappearance of A ?

Explanation

For the given reaction , rate `-2(d[A])/(dt)=(1)/(2)(d[B])/(dt)`
The rate of disappearance of `A=-(d[A])/(dt)` and the rate of appearance of `B=-(d[B])/(dt)`.
`2xx` the rate of disappearance of `A=(1)/(2)xx` the rate of appearance of B.
`therefore` The rate of disappearance of `A=(1)/(4)xx` the rate of appearance of B.