Learn

Saturday, 31 October

Same idea in other shifts

Asked 13× in all
  1. 4 Apr 2026, Shift 2 · Q74For a first order reaction A→B\mathrm{A\rightarrow B} [table: t/min = 0, x, 20; [A]/M = 0.6500, 0.0650, 0.00065] x=x= ________ min.…MediumNumerical value
  2. 5 Apr 2026, Shift 1 · Q75If the half life of a first order reaction is 6.93 minutes then the time required for completion of 99% of the reaction will be ________…EasyNumerical value
  3. 2 Apr 2025, Shift 2 · Q71For the reaction A→BA \rightarrow B the following graph was obtained. The time required (in seconds) for the concentration of A to reduce…MediumNumerical valueHas a figure
  4. 30 Jan 2024, Shift 1 · Q87The rate of First order reaction is 0.04 mol L−1^{-1} s−1^{-1} at 10 minutes and 0.03 mol L−1^{-1} s−1^{-1} at 20 minutes after…MediumNumerical value
  5. 26 Jul 2022, Shift 2 · Q64At 30°C, the half life for the decomposition of AB2\mathrm{AB_2} is 200 s and is independent of the initial concentration of…MediumSingle correct
  6. 3 Aug 2021, Shift 2 · Q57The inactivation process of virus is first order with respect to virus concentration and 2% of the virus was inactivated in the first one…MediumNumerical value
  7. 24 Feb 2021, Shift 2 · Q57Sucrose hydrolyses in acid solution into glucose and fructose following first order rate law with a half-life of 3.33 h at 25∘25^\circC.…MediumNumerical value
  8. 22 Jul 2021, Shift 2 · Q57N2O5(g)→2NO2(g)+12O2(g)\mathrm{N_2O_{5(g)} \rightarrow 2NO_{2(g)} + \frac{1}{2} O_{2(g)}} In the above first order reaction the initial concentration of…EasyNumerical value

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.