Question

Q 90 For the following reaction the half life period is 10 minutes.
A(g) → B(g) + C(g)
Determine the time at which the concentration of "A" is reduced to 1% of original concentration.
Ops: A.
33 minutes
O 44 minutes
0 66 minutes
O 99 minutes​

Answer 1

Answer:

Given, t1/2=10min

For elementary reaction X (g) ⟶Y (g) +Z (g)

A=A 0 e −kt ⟶(i) Where A0

is initial concentration, while A concentration at time t.

Since, K=t 112×0.693 = 100.693 =0.0693

From equation (i), we have

0.1A0 =A 0e −0.0693×t

In 0.1=−0.0693×t−2.303=−0.0693t

t=33.23min.≈33min