AP EAPCET 20-Aug-2021 Shift 1 Paper

(b) Unit of rate of reaction

d[A]

dt

=k[A]
Unit =ms−1
(a) Rate of disappearance
A→B
−

d[A]

dt

→ms−1
(d) For 1st order
−d[A]‌dt=k[A]
ms−1=km
k=s−1
For 2nd order

−d[A]

dt

=k[A]2
ms−1=k[m]2
k=m−1s−1
So, k depends on order of reaction and unit of k for 1st order reaction is s−1.