ChemistryNEET 2019Integrated rate equations and half-life

Chemical Kinetics

If the rate constant for a first-order reaction is $k$ , the time $t$ required for 99% completion of the reaction is given by:

A. $t = 0.693/ k$
B. $t = 6.909/ k$
C. $t = 4.606/ k$ ✓
D. $t = 2.303/ k$

You have the answer. The worked solution — and why the other three were written — is part of a paid pack.

More from this chapter in past papers

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From Chemistry › Chemical Kinetics › Integrated rate equations and half-life — lectures, notes and every past question on it.

Last revised 7 Sept 2026. Found a mistake? Tell us — corrections are the fastest thing we act on.

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