For a chemical reaction `A +2B to C ` if the rate of disappearance of A is 0 .5 mol `dm^(-3)` per hour , the rate of disappearance of B is

Options

A. `0.25mol dm^(-3) hr ^(-1)`
B. `0.5mol dm^(-3) hr ^(-1)`
C. `1 mol dm^(-3) hr^(-1)`
D. `2 mol dm ^(3 ) hr ^(-1)`

Answer

C

Explanation

Rate of reaction `=-(d[A])/(dt)=-(1)/(2) (d[B])/(dt)`
`=2xx0.5=-(d[B])/(dt)`