Chemistry · 2026
JEE Main · 4 April 2026, Shift 1 · Q57
Consider the first order reaction R → P. The fraction of molecules decomposed in the given first order reaction can be expressed as
Consider the first order reaction $\displaystyle \mathrm{R} \rightarrow \mathrm{P}$.
The fraction of molecules decomposed in the given first order reaction can be expressed as
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle 1-e^{-k_1 t}$
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.