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