Question

A chemical reaction proceeds into the following steps

stepI, $2AX$ fast

step II, $X+BY$ slow

step III, $Y+B$ Product fast

The rate law for the overall reaction is ?

• A. (a) Rate = $k[A{]}^2$
• B. (b) Rate = $k[B{]}^2$
• C. (c) Rate = $k\left[A\right]\left[B\right]$
• D. (d) Rate = $k\left[A{]}^2\right[B]$

Answer 1

The correct option is B (b) Rate = $k[B{]}^2$

Option B is correct.

Since there is only one rate determining(Slow step) step.

because Rate of law is determined only slow step