JEE Main Chemistry · Chemical Kinetics
Concentration After n Half-Lives
Concentration After n Half-Lives (Chemical Kinetics) was asked 3 times in 3 JEE Main shifts, 2025–2026, out of the 42 shifts Lumi analysed. 1 of the 3 had a numerical answer.
- Times asked
- 3
- in 3 shifts
- Years
- 2025–2026
- Usual format
- Single correct
- Calculation
- Pattern
- New since 2024
- repeats across shifts
How it is asked
- Percentage remaining after half-lives
- Ratio of times for fractional completion first order
Difficulty
Easy 2Medium 1Hard 0
Where it sits
Chapter: Chemical Kinetics. Topic: Integrated Rate Equations, 24 questions over 12 ideas.
Other repeat ideas in this topic
Every time it came
All 3 questions
Newest first, each with its options and official answer.
- 6 Apr 2026, Shift 1 · Q74Sucrose hydrolyses in acidic medium into glucose and fructose by first order rate law with hour. The percentage of…EasyNumerical value
- 3 Apr 2025, Shift 1 · Q58In a reaction , initial concentrations of A and B are related as…MediumSingle correct
- 8 Apr 2025, Shift 2 · Q54In a first order decomposition reaction, the time taken for the decomposition of reactant to one fourth and one eighth of its initial…EasySingle correct