Rate0.040.03Time1020
For first order reaction r ∝ conc.
r2r1=C2C1=34
∴k=t2−t12.303logC2C1
⇒t1/20.693=20−102.303log34
On solving t1/2=24.1s
NEET UG 2016 — Chemistry Physical Chemistry
The rate of a first-order reaction is 0.04moll−1s−1 at 10 second and 0.03moll−1s−1 at 20 seconds after initiation of the reaction. The half-life period of the reaction is:
Held on 30 Apr 2016 · Verified 9 Jul 2026.
24.1s
34.1s
44.1s
54.1s
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