Question

The rate constant (K) for the reaction 2A + B ®
product, was found to be 2.57 × 105 L mol1
s1 after 15 s, 2.60 × 105 L mol1 s1 after 30 s
and 2.55 × 105 L mol1 s1 after 50 s. The order
of reaction is
(1) 2 (2) 3 (3) Zero (4) 1

Answer 1

If we look at the concentration of products it almost remains constant

This means that the half life or the time doesn't depend upon the concentration of the object

Hence the order of the reaction is 1

As. T=0.683/k

I hope this helps ( ╹▽╹ )