Question

A reaction `A_(2)+B_(2)rarr 2AB` occurs by the following mechanism:
`Ararr A+A`… (slow)
`A+B_(2)rarr AB+B`… (fast)
`A+Brarr AB` … (fast)
Its order would be
A. `3//2`
B. `1`
C. Zero
D. `2`

Answer 1

Correct Answer - B
Slowest step is
`A_(2) rarr A + A (slow)`
Hence, `r = k[A_(2)]`
Therefore, `OR = 1`

Answer 2

Correct Answer - B
Slowest step is
`A_(2) rarr A + A (slow)`
Hence, `r = k[A_(2)]`
Therefore, `OR = 1`